linking to staff page, how to setup entry
You could have two sections:

Staff
Videos


In the videos channel, create a Staff entries field type, select the Staff channel in that field's options.

When you create a new video, you can relate that video to a staff entry.

When displaying a video entry, you could reference that staff that is tied to that video entry like so:

{{ entry.staff }}


If you wanted to be more specific, you would do something like:

{{ entry.staff.title }}


and to get a link to the staff entry that is related to the video entry:

{{ entry.staff.url }}


Here is an article explaining relationships further: https://straightupcraft.com/articles/introduction-to-relations-and-reverse-relations-in-craft-cms-with-examples and documentation on the Entries field type: https://craftcms.com/docs/entries-fields