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\"sheet\": \"https://drive.google.com/file/d/1qf36UH0kNrul2xWmie9b7jdG9V7lICQc/preview\"     },     \"Lec 8\": {       \"https://www.youtube.com/watch?v=C53g2JINR1c\": \"hgjg\",       \"sheet\": \"https://drive.google.com/file/d/1iUTAAueu1PsLE2f-MLOQTbdyChvgT5ol/preview\"     },     \"Lec 9\": {       \"https://www.youtube.com/watch?v=6LcjPVnTgW4\": \"hgjg\",       \"sheet\": \"https://drive.google.com/file/d/1S1JO77-e_y5dWFLaIwNbJ8umnRn5SJyX/preview\"     },     \"Lec 10\": {       \"https://www.youtube.com/watch?v=hTJ1Ar5h5fU\": \"hgjg\",       \"sheet\": \"https://drive.google.com/file/d/1u8Q_X7zXgdgFxR4uxDOuTjORD7sG7-fM/preview\"     },     \"Lec 11\": {       \"https://www.youtube.com/watch?v=qhSoYtfCD3E\": \"hgjg\",       \"sheet\": \"https://drive.google.com/file/d/1UyFzyC0z6CmYdnfrr1mHaRtn7-REBGWX/preview\"     },     \"Lec 12\": {       \"https://www.youtube.com/watch?v=p-nh--hyFcI\": \"hgjg\",       \"sheet\": \"https://drive.google.com/file/d/11WADW2_q0mRfizGmL8WuDfrb1e0mN15J/preview\"     },     \"Lec 13\": {       \"https://www.youtube.com/watch?v=xqACW75GmE4\": \"hgjg\",       \"sheet\": \"https://drive.google.com/file/d/1Fy95aoF4-uIDtPxwbH8BNDfGKdJ1XHou/preview\"     }   },   \"সরলরেখা\": {     \"Lec 1\": {       \"https://www.youtube.com/watch?v=dQYviGRfgGk&list=PLmYvjVa1IG_TBdi0q6k_tK6Dj2eynzyZU&index=36&pp=iAQB\": \"dggd\"     },     \"Lec 2\": {       \"https://www.youtube.com/watch?v=bWlLKGGX5wo&list=PLmYvjVa1IG_TBdi0q6k_tK6Dj2eynzyZU&index=22&pp=iAQB\": \"dggd\"     },     \"Lec 3\": {       \"https://www.youtube.com/watch?v=4o_75QCMHN8&list=PLmYvjVa1IG_TBdi0q6k_tK6Dj2eynzyZU&index=23&pp=iAQB\": \"dggd\"     },     \"Lec 4\": {       \"https://www.youtube.com/watch?v=9-gTSkO6zgk&list=PLmYvjVa1IG_TBdi0q6k_tK6Dj2eynzyZU&index=24&pp=iAQB\": \"dggd\"     },     \"Lec 5\": {       \"https://www.youtube.com/watch?v=9eziJAXdl7A&list=PLmYvjVa1IG_TBdi0q6k_tK6Dj2eynzyZU&index=25&pp=iAQB\": 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19\": {       \"gjgj\": \"https://storage.googleapis.com/teachstack/video_lectures/da124427-da24-4e97-aa46-398fb98bac3a.mp4\"     },     \"Lec 20\": {       \"hgk\": \"https://storage.googleapis.com/teachstack/video_lectures/84d1ee77-e4fb-4aed-892f-c14f8b666953.mp4\"     }   },   \"বৃত্ত\": {     \"Lec 1\": {       \"https://youtu.be/YMl3WorwjEk\": \"ff\"     },     \"Lec 2\": {       \"gg\": \"https://storage.googleapis.com/teachstack/video_lectures/8a275b3b-9631-40b4-86d1-790015c5ef2f.mp4\"     },     \"Lec 3\": {       \"fdf\": \"https://storage.googleapis.com/teachstack/video_lectures/5c6264b3-ac94-4a85-96be-72a56333c28e.mp4\"     },     \"Lec 4\": {       \"dd\": \"https://storage.googleapis.com/teachstack/video_lectures/2acb147a-73d7-4f59-b19e-945b46100b22.mp4\"     },     \"Lec 5\": {       \"https://youtu.be/R1-vY5tChVg\": \"ff\"     },     \"Lec 6\": {       \"https://youtu.be/L_zJjfr0z5c\": \"ff\"     },     \"Lec 7\": {       \"https://youtu.be/lUT6Px942oc\": \"ff\"     },     \"Lec 8\": {       \"https://youtu.be/3Y9D5ssO1L8\": \"ff\"     },     \"Lec 9\": {       \"gg\": \"https://storage.googleapis.com/teachstack/video_lectures/17ca83f2-aea1-4501-a42e-c34c7dd8ef59.mp4\"     },     \"Lec 10\": {       \"https://www.youtube.com/watch?v=d3WAGUBBXMg\": \"https://storage.googleapis.com/teachstack/video_lectures/c51f0fed-b403-40f5-b3d1-1a72ca5fbef9.mp4\"     }   },   \"রাসায়নিক পরিবর্তন\": {     \"Lec 1\": {       \"https://youtube.com/watch?v=umSsgG-n1vA\": \"ff\"     },     \"Lec 2\": {       \"https://youtube.com/watch?v=9aLRMeIhb0A\": \"ff\"     },     \"Lec 3.1\": {       \"https://youtube.com/watch?v=1tiRILLqtU0\": \"ff\"     },     \"Lec 3.2\": {       \"https://youtube.com/watch?v=lC6m5tXfkIc\": \"ff\"     },     \"Lec 4.1\": {       \"https://youtube.com/watch?v=lmU42WbroK4\": \"ff\"     },     \"Lec 4.2\": {       \"https://youtube.com/watch?v=Bbg3tpA-shc\": \"ff\"     },     \"Lec 5\": {       \"https://youtube.com/watch?v=OfMeH7KkN6E\": \"ff\"    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\"ff\"     },     \"Lec 16\": {       \"https://youtube.com/watch?v=HzLUPABwQOk\": \"ff\"     },     \"Lec 17\": {       \"https://youtube.com/watch?v=S0KmHPEk6rM\": \"ff\"     },     \"Lec 18\": {       \"https://youtube.com/watch?v=nIo-7xE2XqU\": \"ff\"     },     \"Lec 19\": {       \"https://youtube.com/watch?v=vplK_A7ePOg\": \"ff\"     },     \"Lec 20\": {       \"https://youtube.com/watch?v=ftSObn1SFpM\": \"ff\"     },     \"Lec 21\": {       \"https://youtube.com/watch?v=61WNnyO9psE\": \"ff\"     },     \"Lec 22\": {       \"https://youtube.com/watch?v=SVO01GAJzZE\": \"ff\"     }   },   \"পরিবেশ রসায়ন\": {     \"Lec 1\": {       \"https://youtube.com/watch?v=U_kSz61M0ck\": \"ff\"     },     \"Lec 2\": {       \"https://youtube.com/watch?v=e-N01gQ7cvI\": \"ff\"     },     \"Lec 3\": {       \"https://youtube.com/watch?v=mmeuU_MwLhA\": \"ff\"     },     \"Lec 4\": {       \"https://youtube.com/watch?v=M4oi1phMju8\": \"ff\"     },     \"Lec 5\": {       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\"https://youtube.com/watch?v=DQ0MLLb04UE\": \"ff\"     },     \"Lec  13 \": {       \"https://youtube.com/watch?v=B7k3LsNG2Lc\": \"ff\"     }   },   \"পর্যাবৃত্ত গতি\": {     \"Lec p1\": {       \"https://youtube.com/watch?v=B_z1Lk25CeQ\": \"ff\"     },     \"Lec p2\": {       \"https://youtube.com/watch?v=O61mUH4ixKo\": \"ff\"     },     \"Lec p3\": {       \"https://youtube.com/watch?v=4-27QG5EAnE\": \"ff\"     },     \"Lec p4\": {       \"https://youtube.com/watch?v=ZeW3WNwPils\": \"ff\"     },     \"Lec p5\": {       \"https://youtube.com/watch?v=8rVsRVtTcec\": \"ff\"     },     \"Lec p6\": {       \"https://youtube.com/watch?v=Wm2EPQtqHIk\": \"ff\"     },     \"Lec p7\": {       \"https://youtube.com/watch?v=b1PAJCm3hjA\": \"ff\"     },     \"Lec p8\": {       \"https://youtube.com/watch?v=RW3PCNGU8m8\": \"ff\"     },     \"Lec p9\": {       \"https://youtube.com/watch?v=vVNvV-P3tGI\": \"ff\"     }   },   \"ভৌত আলোকবিজ্ঞান\": {     \"Lec  1\": {       \"file:///D:/webapp-/p2/7/1.mp4\": \"ff\"     },     \"Lec 2\": {       \"file:///D:/webapp-/p2/7/2.mp4\": \"ff\"     },     \"Lec 3\": {       \"file:///D:/webapp-/p2/7/3.mp4\": \"ff\"     },     \"Lec 4\": {       \"file:///D:/webapp-/p2/7/4.mp4\": \"ff\"     },     \"Lec 5\": {       \"file:///D:/webapp-/p2/7/5.mp4\": \"ff\"     },     \"Lec 6\": {       \"file:///D:/webapp-/p2/7/6.mp4\": \"ff\"     },     \"Lec 7\": {       \"file:///D:/webapp-/p2/7/7.mp4\": \"ff\"     },     \"Lec 8\": {       \"file:///D:/webapp-/p2/7/8.mp4\": \"ff\"     }   },   \"সেমিকন্ডাক্টর ও ইলেকট্রনিকস\": {     \"Lec 1\": {       \"file:///D:/webapp-/p2/10/1.mp4\": \"ff\"     },     \"Lec 2\": {       \"file:///D:/webapp-/p2/10/2.mp4\": \"ff\"     },     \"Lec 3\": {       \"file:///D:/webapp-/p2/10/3.mp4\": \"ff\"     },     \"Lec 4\": {       \"file:///D:/webapp-/p2/10/4.mp4\": \"ff\"     },     \"Lec 5\": {       \"file:///D:/webapp-/p2/10/5.mp4\": \"ff\"     },     \"Lec 6\": {       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<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"> <title>Mcubd</title> <style> body{ background-color:grey; } #btn{ background-color:#8f9491; } #in{ background-color:#8f9491 } </style>     <style>         video,body{             margin:0;             padding :0         }         #ff{             height:100vh;                     }         .a{             margin:40vh         }         input,button{         margin :1px;         width: 200px;          /* Adjust widths as needed */          height: 40px; }        .m{        display: flex;         flex-direction: column;         justify-content: space-between;         align-items: center;              }                      </style>               </head><body>         <div class=\"a\"></div>         <div class=\"m\">          <input autocomplete=\"off\" id=\"in\" type=\"text\">          <button id=\"btn\">Lets go!!!</button>           </div>          <script>          // JavaScript code          document.getElementById('btn').onclick = async function() {          let vall=document.getElementById(\"in\").value;             window.val=''               if(vall.length >8){ val=vall     }else{                    const text = await navigator.clipboard.readText();                  val=text          }          if (val.startsWith(\"m.you\") || val.startsWith(\"http://m.you\") || val.startsWith(\"https://m.you\") || val.startsWith(\"https://you\") || val.startsWith(\"http://you\") || val.startsWith(\"you\") || val.startsWith(\"www.you\") || val.startsWith(\"https://www.you\") || val.startsWith(\"http://www.you\")) {         console.log(\"youtube baby\");                                  try{                                  let myObjectt = await fetch('https://pipbd.cyclic.app/yt?yt='+val);         let myText = await myObjectt.text();          let status=await myObjectt.status;          let res= myText.replace(/&title.*/, '');       //window.open(res,'_self')           if(status!='200'){             console.log('pipbd 500 error');           document.body.innerHTML=`<h1>NOT AVAILABLE</h1>`;             return 33           }       document.body.innerHTML=`       <video id=\"mv\" width=\"100%\" src=${myText} controls>         Your browser does not support the video tag.       </video><div id=\"ff\"></div>`            }catch(e){       console.log('pipbd 500 error');           document.body.innerHTML=`<h1>NOT AVAILABLE</h1>`;             return 33       }                        } else if(val.startsWith(\"https://drive.google.com\") || val.startsWith(\"http://drive.google.com\") || val.startsWith(\"drive.google.com\") || val.startsWith(\"www.drive.google.com\") || val.startsWith(\"https://www.drive.google.com\") || val.startsWith(\"http://www.drive.google.com\")) {       ///////////////  console.log(\"gdrive baby\");     const pattern = /id=([^&]+)/;     const pattern2 = /d\\/([^/]+)/;     const match = val.match(pattern);     const match2 = val.match(pattern2);            if (match) {         const result = match[1];     let srcc=`https://www.googleapis.com/drive/v3/files/${result}?alt=media&key=AIzaSyCZ8IJ6yrMTPetNZyYVH4vyX4rc0L46AGc`     document.body.innerHTML=`     <video width=\"98%\" height=\"auto\" controls>       <source src=${srcc} type=\"video/mp4\">       Your browser does not support the video tag.     </video>          `     }          if (match2) {         const result = match2[1];     let srcc=`https://www.googleapis.com/drive/v3/files/${result}?alt=media&key=AIzaSyCZ8IJ6yrMTPetNZyYVH4vyX4rc0L46AGc`     document.body.innerHTML=`     <video width=\"98%\" height=\"auto\" controls>       <source src=${srcc} type=\"video/mp4\">       Your browser does not support the video tag.     </video>          `     }                        }else{     ////////  console.log('other')                document.body.innerHTML=`     <video loop width=\"98%\" height=\"auto\" controls>       <source src=${val} type=\"video/mp4\">       Your browser does not support the video tag.     </video>          `     }                    return 66                                              //          let myObjectt = await fetch('https://pipbd.cyclic.app/yt?yt='+val); let myText = await myObjectt.text(); let status=await myObjectt.status; let res= myText.replace(/&title.*/, '');     // //window.open(res,'_self')                                 // document.body.innerHTML=`     // <video id=\"mv\" width=\"100%\" src=${res} controls>     //   Your browser does not support the video tag.     // </video><div id=\"ff\"></div>     // `               //  }else{      //  const text = await navigator.clipboard.readText();      //  let myObjectt = await fetch('https://pipbd.cyclic.app/yt?yt='+text);     //   let myText = await myObjectt.text();      //   let status=await myObjectt.status;      //   let res= myText.replace(/&title.*/, '');     // //window.open(res,'_self')     // document.body.innerHTML=`     // <video id=\"mv\" width=\"100%\" src=${res} controls>     //   Your browser does not support the video tag.     // </video><div id=\"ff\"></div>`          //  }      };      document.body.onclick = function(event) {       // Your code here       var video = document.getElementById(\"mv\");        video.requestFullscreen();       video.play()     };               </script>   <script src=\"https://mcubd.github.io/mcubd/custom.js\"></script>         </body></html>     ","vpdf":"{   \"ম্যাট্রিক্স ও নির্ণায়ক\": {     \"Lecture 1\": {       \"sheet\": \"https://drive.google.com/file/d/1-3GbHrYdaGcsi8w4E9tLlri2TxBMAZSH/preview\",       \"prac\": \"https://drive.google.com/file/d/14DZ5QKG-Ffz5uwD8ZFQvc4BdVrFeMd_O/preview\",       \"sol\": \"https://drive.google.com/file/d/1-_QNaVNwH1_ISxynXiLsVNQgI97i32T9/preview\",       \"dsheet\": 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