Solved
Amazon Uses "Happy Streaming" Trademark
When a Roku device or TV is registered, the Getting Started video claims that "Happy Streaming" is a Roku trademark. Amazon has used this slogan in a Fire video as well. I've viewed the mp4. Is it actually trademarked?
Roku has a Common Law trademark of "Happy Streaming". (more limited than a Registered Trademark"
https://docs.roku.com/published/trademarkguidelines/en/us
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Looks like Roku abandoned/failed to file (ie. no longer wanted), the Registered Trademark of Happy Streaming in 2014.
https://tmsearch.uspto.gov/bin/showfield?f=doc&state=4805:1jxvn.2.1
