Edit : Sorry I'm blind.. I just found out there was already a progression bar I was sure there was none yesterday.. sometime I forgot to double check
It would be nice to have an option to rewind the replay. I think the coolest way to do so would be to have a progression bar (% according to time) to select the sequence in the replay you wanna watch. The progression bar could also be used to jump to a specific moment too. It would also be nice if it could be dynamic, so we can see if the game is at the middle or near the end :p
Again, thank you for your nice project. It is nice to watch replay from web browser