Is it the same clip with the same mask for every video? If so, this is what I would do:
1. In your project that has a finished sequence with the outro video and associated mask, create a new sequence that matches the same settings as your finished sequence and label this new sequence Outro Video Element or something to that effect.
2. Copy the Outro Video clip from your finished sequence and any associated elements that repeat from episode to episode like a music sting or something. Then paste these items into your newly created sequence.
3. Save and close the current project.
4. There are two different things you can do here, you can either import the sequence (using the Media Browser) you just created into your new episode that needs the Outro video OR you can create a new project where you keep repeating elements and effects that are in your show. Personally, I would create a new project and call it Show Elements or something to that effect. In this project I would keep all the effects, music stings, etc. that you use on a regular basis for the show. In AVID this would be a Bin that had these items that could be opened and closed when needed; in legacy FCP this would have been it’s own project that could be opened and closed as needed; but Premiere doesn’t allow you to have multiple projects open so I’ve found that creating a hybrid of the AVID and FCP model works well.
5. If you create a new project, import the new sequence you created and any other elements you use repeatedly. Now you have a project that is just the show elements so you don’t have to remember where you first created that original sequence with just the outro video. Save the project.
6. Open the project that you’re currently working on and then import just the necessary items you need for your show.
Hope this helps,
Jamie