I get symptoms from most device screens, but have found that I can watch videos with complete impunity, without getting any symptoms at all, for as long as I like, on nearly any device, including on my impossible samsung tablet that puts me out of commission after looking at anything else on it for more than two or three seconds.
The only exception so far has been, for some reason, cameras and camcorders that show the image they are pointing at on a mini digital screen.
Because we all have such different symptoms and reactivity, I'd be really interested to hear if any of you, like me, have problems with most device screens but are fine with videos on most devices. Then we might be able to share with each other what has worked for us: what works for one of us might also work for the others.
Looking forward to hearing from my symptom siblings!