Updated - Juq439mosaicjavhdtoday11132023015839 Min

Given a speculative approach:

3–8 min — HTML skeleton index.html:

videoFile.addEventListener('change', (e)=> const file = e.target.files[0]; if (!file) return; srcVideo.src = URL.createObjectURL(file); ); juq439mosaicjavhdtoday11132023015839 min