Does anyone have an update on whether or not this is still an issue on 14.3? I have been experiencing this same issue with my app when we upload videos, but I see that in the newest 14.3 patch notes there is a bug fix which reads:
"Some videos would not appear correctly when shared from the Photos app"
I am trying to test it, but I would love to know if anyone has found this update to solve the problem for them.