Have you tried the BBC Shinobi-San?
No videos here (don't work outside of Europe), but full LIVE text commentary all the way back to the start of the day, including all results, all medals, and updates:
http://www.bbc.co.uk/sport/0/olympics/19014806
There will be a highlights show, but that's on later. But if it works, try this (this is what we here in the UK get on Sky!):
http://www.bbc.co.uk/sport/olympics/2012/live-video