Meet John B. AdrainFrom what I've been able to find out, this appears to be the inventor suing Avigilon. He's obviously big on security himself and knows a thing or two about the industry.
https://channel.nationalgeographic.com/channel/doomsday-preppers/articles/meet-the-preppers-john-adrain/
Also, based on the list of defendants he's gone after, and he does seem to have been around the block a few times, it doesn't look like he goes after small fish. It even seems he's going after Dahua and Hikvision in parallel.
https://dockets.justia.com/search?query=John+B.+Adrain
I'm sure the Cantor Fitzgerald analyst did a good job investigating the validaty and the potential impact of the claim, but I somewhat agree with his last line in the video and I'm thinking hedging might not be a bad idea.