I think you can do that here...

In the Burn Mode, make sure the Edit is selected after you choose your animated menu. Your screen should look something like the following.

In the area that the red arrow is pointing it you will have the ability to make changed to the animation. Click on the ellipsis (...) and it will open the following dialog.

In the red boxed off area you have a play animation as endless loop...

I hope this was helpful.