I find having the score in front of me can be useful when listening, so I would choose that by default, if offered two versions.
Me too. Though I tend to prefer if the score 'scrolls' with the music rather than having only a single page presented, and if a video with score doesn't advance to the next portion of the score in time with the audio I may turn the video off.
(Youtube's sound quality is rarely good enough for me to prefer watching videos there—unless the recording is unavailable at higher bitrates I probably won't bother listening, same with mono recordings if I can find stereo remasterings)
