Animation doesn't play in editor

I’m new to UE4 and trying to record a video of an animation imported from an external program. The import is FBX, and I can view the mesh and skeleton animation in the mesh edit preview. My problem is that the mesh in the editor doesn’t animate, so I can’t record a video of it with a camera actor. Any help or tutorial link would be appreciated.

Is the mesh part of a BP, or did you just dragged to the viewport? If so, then select it and make sure that “Playing” is checked:

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Is the mesh part of BP, if not, select the level sequence icon in the editor and go to details panel.
check the auto play in the details panel.

Is the mesh part of BP, if not, select the level sequence icon in the editor and go to details panel.
check the auto play in the details panel.