Depends on how puritanical you on the term chiptune but these are a few ones that I've personally enjoyed.

Endless Fantasy by Anamanaguchi:

https://youtu.be/euTyRhnqFtA

Gaming Mix be Xefox Gaming

https://youtu.be/smnPns0keDY

Chiptune Playlist by Krelez

https://youtu.be/k0bQuzp9Iss