Mine is working now! I hope yours is too. I'm really glad you posted about this yesterday, it helped me from turning my phone inside out trying to fix it. Your post helped me to see that it wasn't *my phone* but a fb messenger problem. Thank you.
I'll be watching for an answer, I'm having the same problem with fb messenger. Mine was working fine until today, now video doing a black screen. I tried uninstall and reinstall and other things.
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