HTML Overlay missing in version 21

[Elusien]

I’m afraid not - see here for other options:

What to do if/when WebVfx disappears

There are several “use cases” for WebVfx in Shotcut. Some of which can be replaced using keyframes instead e.g. simple scrolling credits, both vertical and horizontal. Other effects cannot easily be replaced by keyframes, such as complex text animation, image (de)fragmentation, explosion/implosion and filters that manipulate the video frames, like “persistence”, “sniperscope” and other WebGL operations such as transitions and so on. For me there are two main options to work around the fact that…