Hi rm57,
Welcome to the Roku Community!
Thanks for contacting us regarding your playback issue with MTV Live. No worries; we're here to find you the best resolution possible.
Please be advised that when removing the channel, please make sure that you are restarting your Roku device before adding the channel back again.
If you are still unable to resolve this, we recommend contacting the customer support of the affected channel directly regarding the issue you are running into. Many channels on Roku are developed and maintained by the channel providers themselves.
Please keep us posted on what you find out!
Best regards,
Chel
