So I only just discovered this site to watch TI replays on:
It lists all the matches and has links for all via YouTube (which I prefer) and twitch. The best part of watching through this site is that it hides the remaining time left in the video, which towards the end of a match becomes a big spoiler (especially when moving to the best of 3 matchups). It has handy controls for going forward and back in time to get around the issue of not having the time bar.