I never locally recorded it but I have the demos and I was wondering if there was a way to watch the entire run again without having to select each demo individually and also have livesplit auto splitting the run at the same time so that I can upload the vid to my youtube channel.

There is a tool on resources called "startdemos creator" that allows you to play back a set of demos at the same time, which you could record, but I'm not sure if livesplit would autosplit it

ill try that thanks!

Use Startdemos Creator to playback the demos and use OBS Studio to record them to a video file