How do I mark shows in bookmarks that I've watched already?"

Hi there! @Wranglerdave We can definitely check the best way to assist you with this matter.

Before we continue, could you please confirm if you have DIRECTV Satellite or DIRECTV STREAM? Thanks in advance. 

Nicolas, DIRECTV Community Specialist

I have AT&T Internet and have tried Directv Stream not too long ago and am considering returning but I don't want to watch the same shows multiple times so I want to know if I can mark shows "as watched".

Thanks for the update @Wranglerdave.

At the moment, DIRECTV STREAM provides the option to bookmark titles, you can select up to 100 titles. 

Nicolas, DIRECTV Community Specialist 

U can't remember which episodes you've watched???

I have DirecTV Satellite service