Blocked by #266 and #278

Description

Implement the my videos view, according to the design https://www.figma.com/file/rBjfm2tJ2Pr9M0UNTduU9v/Joystream-Atlas?node-id=3079%3A2721

Requirements

• Matches the design and all its functionalities
  • To simplify, let's include all drafts first in the grid
  • No Private tab
• Scales on mobile devices properly