I’m having trouble with the upper cut into the spin at the beginning are there any tutorials anywhere for an in depth look at it?
Where exactly is this? I assume you're talking about a boosted uppercut, but I can't think of any that are at the beginning of the run. Here's a few videos that might help you on that tho:
There’s this 20 min speed run on YouTube where a guy does it. I got it once but I’m having trouble doing it again
Well, doing the flag proxy isn't recommended until you're at a very high level. But in general for boosteds, did you watch the videos I linked?
After the recent Twitch changes to VOD storage that you've surely heard about, we've decided to no longer accept Twitch VODs for submissions to the Jak boards. From now on, only YouTube links will be accepted for video proof in a run submission, and we would encourage you to export any previous runs