I just created a design in Adobe XD and then I exported it to After Effects and made some animations. I downloaded a Photoshop mockup for iPhone X and now I want to use that video created in After Effects on the ps mockup. I tried creating a timeline in ps but the process it's very slow and buggy. Is there any way to use my video on that mockup? Thank you!
Yes, use After Effects to put them together, not Photoshop.
Import the mockup file (
.psd) into your Ae project and place the animation inside the mockup frame.