I do quite a lot of this kind of stuff for my job. Some thoughts that may be useful.

Often the full IDE is needed. I record a lot of gifs of VSCode, where part of the gif is typing code, part is interacting with the rest of the IDE / terminal - perhaps to run the code and view the output.

For me the killer app would be one which could pre-record keystrokes (and maybe mouse actions) so that I could do them error free. I often attempt a gif 10 times before I'm happy with the outcome.

I don't personally love the transition animation. I would want the option for something that seems like it's being typed.

The closest tools I've found are:

Typewriter VSCode extesion: Allows you to copy text and then "types" it out for you. https://marketplace.visualstudio.com/items?itemName=dansilve...

Ascii Cinema: https://asciinema.org/