Why can't I play media files anymore?

[Windows Central Question]

Yesterday when I tried to watch a FaceBook video, the message "sorry, we can't play this file on your phone"(something like that) popped up and I couldn't watch it. No biggie, I can live without facebook videos. But then I went on youtube to watch a video, and it also didn't work! It said: Invalid source. I rebooted my Windows Phone (Lumia 820, WP8.1) And it still didn't work. I was about to step on my bike and put some music on, which then ALSO didn't work! And before I rebooted it my music was playing! When I try to open the old school music hub, it just instantly sent me to the home screen. When I try to open the new music hub (which is- sorry, utterly awful) it lets me scroll trough my music for a few seconds and then also closes itself.

Anyone, please help me ASAP.

 

[srikanth reddy4]

If u are really facing such a big problem then better reset your phone

 

[kurtd]

Same issue here. I can no longer play videos in the Facebook beta app.