I see, I think...
Mobile Site URL -
http://m.youtube.com/?#/watch?v=9kE-ILnqB-A (Notice the "m." before "youtube" in the address.)
Main Site URL -
(Notice the unique identifier "9kE-ILnqB-A" is common to both addresses.)
Thanks to Tryinghard973 and TheatreKid!
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My dog
mastered the "fetch" command. He would communicate he wanted something, and I would fetch it.