With that same mesh I made a basic animation… Just the top of the pot opens. Without any rigging or anything just moving the top of the pot to the ground.
if your mesh dont have any skeleton…u cant have animation with this setting…although u can achive this by using 1 of 3 ways :
1.using vertex animation;
2.using Import alembic into UE4;
3.split your mesh into 2 parts and make animation with your lid…
Hope it can help u…Cheer !