Same, I've been an "enjoyer" of deepfakes since the early Photoshop days but didn't get into the creation of them until the first nudify apps started to appear online, but once sites like motionmuse and such started to appear online, I was hooked 😁
MotionMuse has been the primary site I've been using. But I've been dabbling around with Playbox as well. They allow you to generate longer animations (up to 10 seconds I think) but it costs more credits to use the feature.
https://simpcity.cr/
Has a very dedicated faking community. (It's where I got my start) But the site has and will go down without warning due to maintenance issues. Currently you can't even Register for an account atm.