QuickMagic

You upload a video through your web browser, and QuickMagic returns a 3D animation built from the motion in that footage.

QuickMagic is an AI motion capture tool for animators and game developers who want 3D character movement without a suit or a studio rig.

The AI does the capture itself, so the browser is the only thing you need to start.

Hand capture is part of the package, which matters if your animation depends on fingers and gestures.

Exports come as FBX, VMD or BIP files.

Those formats open in 3DMax, Motionbuilder, Maya, Unreal Engine, Unity and Blender, so the result can drop into the pipeline you already use.

QuickMagic also lists an API and avatar and video generation among its categories, though motion capture from video is the core of what it does.