WebM VP9 and VP8 in front, HLS with VP9/MJPEG video and Opus/MP3 audio behind.
HLS VP9 + Opus/MP3:
HLS Motion-JPEG.mov + Opus/MP3:
HLS H.263.mov + Opus/MP3:
HLS H.263.3gp + Opus/MP3:
HLS MPEG-4 Visual + Opus/MP3:
HLS H.264 + Opus/MP3:
HLS VP9 in fMP4:
HLS MJPEG.mov in fMP4:
HLS h.263.mov in fMP4:
HLS h.263.3gp in fMP4:
HLS MPEG-4 Visual in fMP4:
HLS h.264 in fMP4:
HLS Opus in fMP4:
HLS AAC in fMP4:
HLS MP3: