My phone is unable to play music or any video

Something happened a few days ago. First i noticed that my youtube was crashing while watching random videos then i couldn't play videos on instagram [the video keeps buffering i guess]. I thought maybe my memory is full so i cleared cache memory but the problem was still there. Yesterday i was going to listen to music and when i clicked play i got this message [kind of. my phone is not in english] "Could not play the track requested." I tried with another song but same problem. I even tried...

My phone is unable to play music or any video

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