Add VP8, VP9 and AV1 support to MP4 demuxer

dev/player.html

@@ -203,6 +203,8 @@ async function runAudioIterator() {
 }
 
 function formatSeconds(seconds) {
+	seconds = Math.round(seconds * 1000) / 1000; // Round to milliseconds
+
 	const minutes = Math.floor(seconds / 60);
 	const remainingSeconds = Math.floor(seconds % 60);
 	return `${minutes}:${remainingSeconds.toString().padStart(2, '0')}.${Math.floor(1000 * seconds % 1000).toString().padStart(3, '0')}`;