YouTube doesn't play videos

[Somi18]

I own xperia z,one month ago the YouTube app was playing videos flawlessly but now it doesnt, it always says connection to the server is lost, try again. Note that my internet connection is efficient, I do clear the cached data, I also tried uninstalling and then reinstalling the YouTube update and also my phone doesnt have any storage apps or antivirus apps or any sort of memory boosters

[Samuel1]

I suggest that you try to repair the phone software using PC Companion..

Before repairing your device you may want to backup your information first. Check out this topic for more information on how to.
How to backup?

If the issue should still remain I think that this needs to be examined and fixed at a repair center. For more information about how to submit your phone for repair and where, contact your local support team.

[Somi18]

Can you suggest any solution other than repair

[devxfred]

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@Somi18 wrote:
Can you suggest any solution other than repair

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No...they don't .Actaully they can't.

Common issue all over youtube app.Happening with my samsung s3,too.Mail Google.They are making things worse now-a-days.

Sorry for off topic,but do you have any error in Play store like 923 or 905 while updating batch apps?

[Samuel1]

Unfortunately not, as you've done a pretty good job doing about everything you can do by yourself except for a software repair.