body { display:flex; flex-direction:column; align-items:center; gap:8px; font-family:Arial;} canvas { background:#000; width:960px; height:540px; } 12–25 min — Core JavaScript: load video, sample frames, build mosaic in canvas script.js (key parts):
videoFile.addEventListener('change', (e)=>{ const file = e.target.files[0]; if (!file) return; srcVideo.src = URL.createObjectURL(file); }); juq439mosaicjavhdtoday11132023015839 min
Total time: 39 minutes of work broken into timed segments so you can follow live. body { display:flex
let tileCols = 40; // adjust for mosaic granularity let tileRows = 22; } canvas { background:#000
<!doctype html> <html> <head> <meta charset="utf-8" /> <title>Mosaic Video Builder</title> <link rel="stylesheet" href="style.css" /> </head> <body> <input id="videoFile" type="file" accept="video/*" /> <button id="startBtn">Start Render</button> <video id="srcVideo" controls style="display:none"></video> <canvas id="mosaicCanvas"></canvas> <script src="script.js"></script> </body> </html> 8–12 min — CSS layout style.css: