I'm curious how this ultimately scales. I'd bite on believing that these videos can convert better than a boring templated email, but I'd also assume most of that lift is because they're different and enough users haven't caught on to the fact that these are generated.
When people talk about personalized email working better than automated outreach, they usually mean actually personalized emails, which contain at least one sentence that is not just placeholder substitution. Templated emails with substituted variables are usually easy to spot, as evidenced by the number of "I'm really interested in what you're doing at Stealth Startup" messages in my email/LinkedIn.
So, to my question: do you think the lift in conversion you've seen in early tests is sustainable? As people start to understand that this is the new marketing tactic, do you think the average person becomes more aware of it and starts to believe that most videos in their inbox are probably just auto-generated also? Ditto for other use cases. If people like their video-generated product walkthrough because it feels personal, what happens when they start to realize it's almost certainly not?