Hey guys! The last 4 years I've watched a lot of speedrunning and I think there's a lot of people that doesn't know about this community at all and I think they deserve some attention from you all.
Many of you have probably seen "Super Mario Bros done in under 5 minutes" or "Quake Done Quick" and these are some great speedruns! Below I will provide you with some links for some awesome speedrunning sites and most runners today have streams for you to follow.
Speed Demos Archive - All the games you can imagine.
SDA Stream Page - All speedrunning streams, Often with commentary.
Speedrunslive - Mostly racing, Player vs Player to beat the game in the fastest time
3D Zelda Speedruns - Only Zelda, World records, New glitches etc.
TASVideos - Tool-assisted speedruns
There you go, I hope you will enjoy this as much as I do and if you got any questions just post in the comments and I will try to answer as fast as possible.