I cannot watch any videos on YouTube on my internet connection but when I connect it to the wifi it seems to work can u help me fix this issue and my internet is working completely fine I already checked @TeamYouTube
That's strange, if you are using a browser, try clearing cache and cookies. Here's how: https://goo.gl/dwzcyo . If you are using the app, try deleting the app, restarting the device and reinstalling the app. Keep us posted!