How to clear little black dot in bottom right corner?

Anyone know how to clear that black dot?  I watch my favorite TV shows frequently.  The black dot I’m refering to is on the file before you click it.  It can also be a half moon if the player thinks you didn’t finish the video.  I would like to clear that dot manually so that I know which episodes I’ve watched recently without having to search through the recently watched items.  That’s too much trouble.  Thanks!

.

The “Dot” has two states.

Empty (unwatched)

Half-Full (watched for any duration.)

Clearing it would mean you’ve NOT watched it.

But no, short of editing the database by hand, clearing the media library as a whole, or moving files around (such that the WD thinks they’re new), there’s no way to reset it.