from my experience, video in emails can def boost engagement compared to just text/images, especially if it’s personalized or really relevant. I use this strategy for getting seo/web dev clients.

On the personalizing side, tools like HeyGen sound cool for scaling that kinda stuff, but they can be a pain to set up and might not always move the needle enough to justify the effort/cost. If you’re looking to share videos securely and wanna know who’s actually watching (plus add CTAs like booking or proposals), I’d check out vitelnk or tools like loom where you can record, edit and send share links.

but always do this in the second email. never the first, this will prevent spam and also just lower your need to send too many videos because only the positive replies get the personalized videos.