Improve UI/UX of "My videos" page

[owi92]

The presence and/or functionality of filtering options for the video table are not obvious to casual users. The redesign suggests using drop down menus instead. It was also suggested to move the pagination to the center or left of the table. (for both suggestions, see screenshot below)

There have been plans to improve and refactor the "My video" page for some time now, and some related issues are linked in #319 (comment). The filtering options and pagination might be addressed in any of these, but this issue here should help to keep it on our radar.