Rework userManager.

No more user management is done client-side.

Signed-off-by: Baptiste Millou <baptiste@smoothie-creative.com>
Update gitignore.

Signed-off-by: Baptiste Millou <baptiste@smoothie-creative.com>
Correctly associate user and videos on all clients.

Signed-off-by: Baptiste Millou <baptiste@smoothie-creative.com>
Regroup all videos in the same container.

Signed-off-by: Baptiste Millou <baptiste@smoothie-creative.com>