I got some questions?

• is it possible to add videos that get deleted on youtube or will it get deleted on dtube as well?
• how about copyrighted materials such as music or videogame footage?
• or sharing videos from a friend (to proof dtube works, he gave me permission), how do I prove I got permission from him? and is it necessary?
• I got a lot of music I like but I hate youtube, because it will keep deleting songs from playlists I found, leaving a soundless gap for the duration of the deleted song.
  Is it possible to download music songs I like and upload them to dtube to create a playlist I like where songs won't get deleted? (not for profits ofcourse, just to create a playlist I like).

looking forward to an answer!

@dtube or anyone who can answer