I have a Roland RP102 digital piano, which I purchased so I could practice with headphones so I wouldn't disturb anyone with my playing.
I also have an iPad, and would like to listen to instructional videos with headphones at the same time. Is there a way I can listen to both....so I receive audio via headset for both devices?
The Roland bluetooth blurb says you can "accompany your favourite song as it streams through the piano speakers" so by the sound of it you can stream from your iPad to the piano via bluetooth and presumably if you plug the headphones into the piano you get both audio streams in the headphones and the speakers turn off. "your favorite song" can be anything you like of course including your instructional video.
Presumably you set it up via their Piano Partner app.
http://www.roland.co.uk/blog/bluetooth-change-way-play-piano/ does not list RP102 but it does have bluetooth so maybe the article is out of date.