It's generally known that if you use a song to create a music video, you must have obtained a master use license to publish the track as a part of the music video, and also a synchronization license to synchronize your video with the music.
However, what happens if you make a music video using the song, and then you remove the audio from it when publishing? That way, to view it as intended, the viewer will need to obtain a personal license for the music, for example from a streaming service, and start the music track at the same time as the video starts. The video metadata could point viewers to ways to legally listen to the song, and that it is recommended to view the video with the audio in the background.
What license, if any, would this usage require? My intuition is that this still requires the synchronization license, as the video is still synchronized to the audio, it's just that they're stored separately. On the other hand, an argument could be made that a sync license is made available for a specific recording while this video works with any cover version.
I'm interested in answers both specific to the youtube environment as well as for general distribution.