YesOhYes said:
I posted a couple videos that I made somewhat recently, using footage captured from within a game, edited to music. I didn't know that this qualified as "screenshots". Could you clarify that rule so I don't waste my time trying to upload things like those in the future? Maybe add "game captures"?

The videos I made are here:

https://www.youtube.com/user/NontendoSextyFour

Thanks.

If it's screencapture of a video game, whether a still image or a video, it's still a screenshot.