How pterosaurs started flying

This 18 August 2019 video saysabout itself:

How Pterosaurs Got Their Wings

When pterosaurs first took flight, you could say that it marked the beginning of the end for the winged reptiles. Because, strangely enough, the power of flight — and the changes that it led to — may have ultimately led to their downfall.

Thanks to Ceri Thomas for the excellent Scleromochlus illustration!