Epidemicsound.com, artlist.io, audiio.com all have some decent/good quality music but they are all subscription based. It's ROYALTY free, but the license to USE isn't free. Be careful if you go with any subscription, with some of them, the license is only good if your subscription lapses but with others, the license is lifetime regardless of your subscription status. Source: over 1 year ago

Just in case you were thinking about buying it audiio.com sfx lifetime licence is pretty bad. After being blasted with ads for a one-off lifetime payment for sound effects I bit the bullet and purchased. Turns out it's pretty terrible. They have virtually nothing beyond a few very short city and landscape sounds and a couple of whooshes and some random effects. Source: almost 3 years ago

Check out https://audiio.com - it's fairly newish but they're updating weekly and they have a lifetime membership for a reasonable cost, the music is decent, and the licenses cover virtually anything you need it for. Source: about 3 years ago

Incompetech - Royalty free music by Kevin MacLeod. - Source: dev.to / 4 months ago

Soundtrack is by Myuu, Kevin Macleod, Fesliyan Studios, and Syrinscape. Source: 6 months ago

Incompetech.com - good variety of music by one person, free with attribution. Source: 11 months ago

It's on the video, but just to be clear, the music is 'Echoes of Time' by Kevin MacLeod, used under Creative Commons Attribution 4.0 licence, http://incompetech.com. Source: 11 months ago

The song is made by Kevin MacLeod and probably is on incompetech.com however I do not know the name. Source: 12 months ago