I can't view my own videos on mobile devices
If a copyright owner claims your video, the owner may choose to restrict showing the video on certain devices (mobile phones/tablets, Smart TVs and game consoles).
To learn more about the status of your video and the actions that you can take, visit YouTube's Copyright Centre. You can also view answers to common Content ID questions.
I can't view other channel's videos on mobile devices
YouTube's distribution model allows monetising partners to control the platforms on which content is available. For more info, view Common questions about distribution settings.