Google video search does not recommend. You must make a search query. I'm talking about actual recommendations that you didn't explicitly search for which is where discoverability stems from.
So you intend to collect detailed view data to feed your model? Kind of like a browser extension spying on every video you watch anywhere, collecting detailed data about how you watch, etc? Don't count me in.
I'm thinking more about a website (Client) where you get the recommendations then if you click on one of the recommended videos (either by watching the embed or redirecting from the website) we'll assume that you liked it.
Outside of this website (client) you won't be tracked.