App Store preview file... wasn't there a blog post on Xojo recently?

I recall seeing a tweet from Xojo several weeks ago about how to make an App Store preview mini video to add to iTunes Connect. Does anyone know where that is or how to do it? Specifically interested in an iOS app preview

To easiest way to make a video preview for an iOS app is using iMovie.

Bit of a learning curve (never used iMovie before and had to watch some videos), but worked like a charm! Thanks for the tip!