I watched and enjoyed some videos by Summoning Salt showing the progression of speedrun world records. I made some graphs to visualize the improvements and see the difference between RTA and TAS.

The linked R scripts embed the CSV data used to make the graphs.

Other links:

Super Mario Bros.

Mike Tyson's Punch-Out!!

Focusing just on the RTA, with player names:

Super Mario 64 "120 stars"

Besides Summoning Salt's video, I found a history of world records in this great spreadsheet by Lewis Luo, which I found linked from Paul Bradford's blog.

Donkey Kong

Mega Man (DOS)