I am one of those who used to use the Vanced app to skip ads from videos [though it can't do anything with ads/sponsorships by the YouTube creators]...
But since I don't jailbreak my iPhone and I don't want to mess with the android TV so as to be able to skip ads, I then decided to subscribe to YouTube Premium initially to skip those ads and download the videos within the app...
I used to have Spotify Premium and Apple Music subscription but then I learned that if you do not have your account set to Japan, even if you can use a VPN to spoof your location as if you are in Japan, the music I listen to are mostly Japanese, you still have limited access to Japanese library...
I also do not have a payment method that can be used in Japan and the only time you can change the country is once you are on a free account or the subscription has expired... This is what I know about Spotify but not sure about Apple Music...
I recently found the same [limited Japanese library] with YouTube Music which is free as part of YouTube Premium subscription, but I decided to stick with YouTube and drop Spotify and Apple Music since I can still access Japanese content while using a VPN and some of the music/songs that are locked only to Japan are now being made available to YouTube Music...