Animation: How to bake physics to export to Sketchfab Following this tutorial 

How to make rig that reacts to gravity or seem to behave physically correct?

I made this animation



I am having trouble to bake it/export it so I can display the animated chains in Sketchfab or so. I tried exporting the mesh as alembic and then baking the action to keyframes but that did not seem work.

Here is the file (Blender 2.8):
http://pasteall.org/blend/index.php?id=51625
Select the toruses and the rig then export it to fbx. In the fbx exporter "Main" tab (lower left corner) check in "Selected objects". In the "Animation" tab disable "All actions" and "NLA Strips".