Poor cross-browser support: http://www.phoboslab.org/log/2011/03/the-state-of-html5-audio http://www.phoboslab.org/log/2011/03/the-state-of-html5-audi... Video

Poor cross-browser support: http://www.phoboslab.org/log/2011/03/the-state-of-html5-audio http://www.phoboslab.org/log/2011/03/the-state-of-html5-audi... Video is simpler: you normally play one video at a time, for long time periods. Audio tends to be used to play short clips simultaneously, and if the browser drops some or delays them, it ruins the effect.