https://pastebin.com/zknYABXq

In order to speedrun Unleashed, you need to 100% the game in order to unlock all movie secrets. Follow the "movie skip cheat sheet" in starting from the first movie in order to be able to skip cutscenes in game.

If you want to learn strats, just watch the WR video and practice what he does.

{Edit} Also, there are some cut scenes that you can't view in the movie extras. In order to skip these, you have to watch them in a run, and then keep your console on so in future runs they are skippable.