Use mpv and not umpv
Use mpv and not umpv

Signed-off-by: Tomas Slusny <622c0f670d978481e15f7e7f6c034031aed2306d@pantheon.tech>

deathbeam/awesomedotrc,deathbeam/dotfiles,deathbeam/dotfiles,deathbeam/dotfiles,deathbeam/dotfiles