If you're looking for some classic video game music to be a part of your workday playlist, you can't go wrong with GilvaSunner's YouTube channel, which runneth over with original soundtracks from the NES to the SNES to the PlayStation and beyond.
Check out GilvaSunner's playlists for more video game soundtracks. There are 400 of these.
If you're in the mood for something more modern, GilvaSunner's YouTube channel has recent game soundtracks too, like this selection from The Evil Within.
And the Undertale soundtrack.
If you're looking for some vocal tracks, GilvaSunner has those too.