It would be a game changer to add pop-up windows with description.

[tyFlow]

The problem here is not the idea, but the time it takes to implement it. It already takes enough of my time to keep the official tyFlow documentation up to date. If I tried also creating custom tooltips (with images/videos) for every feature, I'd never be able to focus on any other area of development - that alone would take up all of my time. So it's a nice idea but not feasible for me.