As a fellow (mostly former) chronic insomniac watching a screen before sleep is not a good idea. The blue light emitted from screens suppresses the production of melatonin hormone which affects your day/night cycle.
For a long time I used to watch lots of late night TV/Video when I could not sleep and it really did not help. Now I try to read a little before sleep and use fairly flat earbuds to listen to audiobooks (music keeps me awake).
I 'm not convinced by the blue light theory, stronger, I think it is nonsense. I suffer from severe delayed sleep phase syndrome and special glasses to block the blue light never helped. It seems science is now coming back from the blue light theory and I saw a study plain yellow light has much more potential to keep you awake.
I suppose what is keeping people awake is more about what they are doing with their screens than about the blue light.
If I use a smartphone, it hinders me falling asleep, but if I use an e-reader with background blue led lights, I have no problem falling asleep.
Same with TV/video/music....many of these things simply are too exciting, keep the brains to busy to fall asleep.
I wish I could listen to an audiobook.... reading my Kindle in bed isn't too good for a decent posture and bad for my neck and back but all my Audible books are in foreign languages and English and French are too hard to listen to when I'm sleepy. Maybe I could try German that is close to my Dutch-German dialect.