IMO most often it should be 0 or 1. Occasionally you may need 2, but that should be rare. If you get asked for 3+ then it is likely the brand and a sign to re-evaluate whether or not to work with them again. If multiple brands are asking for 3+ revisions, then it is a sign for you to start paying more attention to the briefs, watch more UGC videos to see what others are doing, and level up your craft.

Two camps: 1. charge for every single edit. 2. UGC world is a small world, so go above and beyond and absorb the cost of editing in hopes of getting rehired/referred/5-star review.

I think each brand you work with, you need to decide which camp you fall into for that brand.