Occassionally I have travelled across the Atlantic. usually these flights leave in such a way that they fly overnight and you arrive at your destination in the AM. When Ive flown to Europe, after dinner most of the passengers are either watching the video or sleeping or watching the videos and falling asleep. the plane is pretty quite so you can sleep.
When I went to israel since most of the charedim did not watch the video they would get up from their seats , mull around the plane and talk to their friends. The plane was so loud you could not sleep. It was even louder than davening.
I dont know what this unknown chassid was doing or who he even was. But while watching the video might have disturbed himself. I really doubt other people cared. They just dont care, they do their own thing. However if he had gotten up and talked to his friend and kept up half the plane would that have been so much better?