Well, now I see what’s happened. It was a conflict between CFBundleURLTypes and LSApplicationQueriesSchemes.
As I see, in CFBundleURLTypes Apple expects only this app’s own schema. Very own stuff to be called outside this app to pass some params directly into it. This way Apple says, that there is no need to add YouTube query scheme inside your own app, it’s not working any more.
But LSApplicationQueriesSchemes (recommended) is used to call another apps directly from this app and describes the best way to specify the call schemes.