Iphone background music problem?

Apple deleted the original youtube app, so now i use my safari to go in youtube and play as background music. But now stupid youtube whenever i hit "play" it doesn't do anything. How do i fix this?
i already restarted my phone

Added (1). I know there's a youtube app but it goes horribly slower, and in the safari it does work as background but it stopped all of a sudden, what i want to know is how to fix it.

Well YouTube on Safari isn't as trustworthy as it is on the actual app, which you can easily download. I don't think there's 'background music' either… Its just music.

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