You should be able to create folders within your store purchases. That way if you have "active" training going on using those videos, you can easily find them to add/delete/update the videos.
For example: I have an existing campaign with the video "2016 CEO Fraud". I would like to replace it with the updated "2018 CEO Fraud", I also have this long list of videos I have added, and need to "hide" the old 2016 CEO Fraud. You have to fish through this long list to get rid of (hide) the old videos.