I don't have a great computer. Do I have to lifestream/record the entire run for it to be valid or do I just have to get a small video at the end to show I got 100%?

I'm referring to a 100% segmented.

So without recording the entire segmented run, I can't submit?

If your cantina timer is under 20 hours, you don't need video proof according to the rules, right?

I think it's over 20 hours.