having trouble with assigning datasets to users and populating photo and video into one container in repeaters.

I’ve ben stuck for WEEKS trying to figure out how to populate members information when users post information to my site. Does anybody know what (if any exists) field to assign to the user who is making the post?

ALSO, where are the user input ‘container boxes’? for photo’s and video? They are not in the user input section, and I’m also looking for a container that can hold photo’s AND video simultaneously.

Here’s the page I’m working on… https://www.hooligansnation.com/submit-post