How can I replicate animations done without keyframe animations/animator to the server?

Hey, I’m trying to impliment Roblox’s old animations but none of those animations used an animator or any proper animations done with keyframes or IDs, just manually moving the parts of the character.

This means the animations are only visible on the client and don’t replicate to the server for other clients, and messes up a lot of vector code for me. Is there any way I can replicate animations such as this
image
to the server without using the animator? Changing the script to a server script doesn’t work.