Keep displaying the last frame from a video after playing for non-looping videos (got implemented), or provide a scrubber in the inspector for custom end frame-selection.
Add the ability for non-auto playing videos to select the preview (thumbnail) frame by the user.
Some options to hide the video controls in presentation mode, which is currently tricky when the video size occupies the full screen.
Provide some notification or indication in the inspector when a video has been fully processed after upload.