It has a lot potential, but needs improvements to work properly.
It doesn't detect every video and it detects files without size that aren't videos.
Downloading doesn't work not mentioning it just automatically save file to default location.
Copying opens a small window with the link that needs to be copied manually. Why it can't just copy link to clipboard without opening any windows?
It would be nice if it could instead of downloading with browser send the link directly to download manager.