Which social media platform is most effective for 3D images, animations, or videos?

I would say Youtube and Instagram showcase heavy visual content. Youtube has good discovery & visibility when it comes to organic search, plus we can put links to it. Instagram I say has a good brand value as a channel where people can showcase their visual work, and put it nicely and consistently in their feeds.

1: Facebook 2: YouTube 3: Instagram 4: Vimeo 5: Sketchfab and many more....

Sure It's Instagram

I think Youtube, Twitter, & Reddit. These are my main used apps so not sure about the others.

Can I consider Behance as social media platform?But lots of good stuff there. Dribble Instagram Youtube for Videos, definitely

Instagram and Snapchat