I installed Video downloader as per the steps on the page below. I can’t figure out how to start the software.
It should be in your desktop environment’s applications menu as “Video Downloader”. If this is the first Snap you’ve installed then you must restart your session by logging out and then back in again for everything to be wired-up in the correct places.
I rebooted and checked again, but no sign of it on any of the menu items.