can someone explain this page to me and what i need to put here?
Have you read this?
https://developer.roku.com/docs/developer-program/discovery/implementing-deep-linking.md
On the left select from the dropdown type of video from your feed,
for example = short-form video or Movie, Etc! On the right go into your feed, and get the video ID number, and enter it! Next place a short Title under that! = Save and done with deep linking!
You will see that once you add one link you will get a checkmark for publishing
question = now will it add all the videos in my feed for deeplinking too, or just that one?
Your feed will add all the videos!