Removing or replacing a video that you have already added to your canvas area is simple.
To remove a video:
Click on the video to show Property Panel on top.
Click the Trash symbol, and the video will be deleted.
To replace the video:
1Double click on the video or click the Settings option on top left to open the Property Panel
Highlight the URL of the video
that is currently listed, delete it and paste in the new URL
3Change any of the settings
to have your video set to autoplay, loop, show controls, for example.
Close the window and see if the updated video image appears.