You know, initially, I was all about calling BS on this video. It just seems terribly strange that someone at Jonathan Goldsmith's level would speak to the investors of a stock worth only a few cents rather than reaching out to the public at large in support of this new form of cancer treatment, if it was in fact something he believed in. It just seems that more could be done if he reached out in a different direction. Not that YouTube isn't a solid avenue, but that speaking to penny stock investors is just strange. My first instinct was that someone knew somebody that could do a solid similar accent and looked enough like him to pull off a short vertical video wearing sunglasses. So, they created a YouTube account, recorded a quick video, uploaded it, and managed to get ~130 views in ~15 hours.
Here's the thing though. He's actually an advocate. A quick Google search of "jonathan goldsmith" "pet" "cancer" pretty succinctly shows on just the first page of results that he's been involved in "the fight to end dog cancer" for a least several years now and has even been involved with, again at the very least, the Morris Animal Foundation. This foundation has invested more than $126 million in 2,670+ studies since their founding that have improved the health and quality of life for dogs, cats, horses, and wildlife around the world.
It also helps that this is actually the look he rolls with in public - https://nypost.com/2015/10/22/village-halloween-parade-about-to-get-a-lot-more-interesting/