Link to the stream!
Probably the biggest speedrun marathon going I think, I always look forward to these events. I'm not super into speedrunning but I do find it really interesting so when these marathons roll around I always make sure to give them a watch.
If you want to take a look for a game you'd be interested in watching they have a schedule here, but personally I'd recommend just watching it, you never know what games are going to surprise you!