Nice to hear you praise the quality. We haven't spent a lot of time on producing the current casts, it's just that the tool makes it easy to create casts of high-production value. No more fiddling with screen-recording software and post-production. It makes a big difference when you can go from "I want to explain this" to a finished cast in three minutes.

The "casts are shown in an overlay"-feature was released yesterday. It certainly requires more iterations. Thanks for the feedback.