I’ve asked the same question elsewhere on this forum.
The video membership theme that I bought for a new site originally came with Membership 2, but I needed to switch after support was pulled. The designer of the theme kept encouraging me to continue with Membership 2, but that seemed risky, because I wanted good support.
The theme developer claimed Ultimate Membership Pro was also supported, although he offers zero documentation for how to best set it up with the theme, so it has been difficult for me to get it going. I asked for help from the developer, but no word, yet.
I ended up using Ultimate Membership Pro, and making my best guesses for how to make it work with the theme. It seems like a good product.
I might try konnichiwa for another membership site, though. Maybe if I discard the video theme I bought and start over…