You've seen these types of videos on most YouTube videos. This site is a site for creating videos.
It is a site where you can make videos in the style that I come across mostly on gaming channels and channels that make Twitch montages.
When I saw this site, I said: "You are crazy". I was truly amazed. It inspired a lot. I hope it inspires you too.
Video processing is an expensive branch, but this site is free. I don't know what the revenue model is. If you know, contact me, I'm wondering like crazy. :)