Edit some Joomla code.

A simple task. (Please don't provide your bid if you can't solve the issue with the available codes 100%) Attached is 1) the code for the component in Joomla 2) screen shot of the joomla cpanel What I want is, as you can see in the screenshot, a) I need to add column (users) to show the login_username as we have several users who access this page, only we need to show their username so we identify who added a video. this column should be next to ID b) We need them to see only the videos added from their user. now, this page is seen from all of them. I guess, no need to access the db, check the code and you'll identify how to modify the query..