Yes, I was struggling with decision to make video more visible (under the headline) and I realized that on mobile then it would show in that order: - headline - video - actual product
From what you are saying it might be actually better to do it like this. Will test that for sure. Also, the background music thing - it's little embarassing, but I originally put video without music and after I while I was like "Hmmm, it's seems a bit dull without music" so I added one from YouTube music library. Seems like that wasn't my best idea so far :D Should I take that music down?
Using Word so many years I must say I never really used serial letters, but yes - turns out to be the same idea behind it. Very good point about conveying value more clear - need to incorporate these as well.
Regarding GDPR compliance - actually files never even leave one's machine. It all happens in the browser (one reason is that doing it on the server was as fast so no point sending it over) so because of that I THINK (must check though) it's already GDPR compliant (because beside emails that are kept on Google Firebase I keep no data).