Hmm, not sure if a crossover client like this exists (yet).
For YouTube on a desktop I use Piped (Instances). You'd need to create an account on one of the instances though to subscribe to channels if that's an option. You can use this account on other instances. LibreTube for mobile uses the Piped API. If you just want everything managed locally on your desktop you can use FreeTube which uses the Invidious API.
Hmm, not sure if a crossover client like this exists (yet).
For YouTube on a desktop I use Piped (Instances). You'd need to create an account on one of the instances though to subscribe to channels if that's an option. You can use this account on other instances. LibreTube for mobile uses the Piped API. If you just want everything managed locally on your desktop you can use FreeTube which uses the Invidious API.