Audio & Video Sync when changing tempo rate

Hi !

Well, i am a guitarist and also use Cubase to learn and cover songs i like.

Sometimes, the artist made a very interesting playthrough video, which brings hints about technical playing points.

A main learning tool i use is lowering the tempo Speed. For audio file, i mainly use the “Set Definition From Tempo” Feature.
But unfortunately, this feature does not apply to video tracks & video items.

Hence i can’t speed up/down the tempo and have both audio and video items synchronised to the new tempo.

Such audio & video synchronisation on the tempo would be greatly appreciated.

Thanks !