I really like this idea of leaving gaps every since I came across the videos by ItsNachoTime / DeliberateSpanish. Here is an example: https://youtu.be/7kbACgcnG8M?t=83

The idea is basically: Once the fill-in-the-blank text appears, stop the video, try to recall the previous sentence (letting the template help you) and repeat it until you can articulate it fluently – that way, you will improve your vocab but also train your hears, pronunciation and intonation.

Unless you're about to finish it today, you should probably post it as a "Show HN", otherwise almost nobody is going to see it.

You can check out my project as well, which does something similar.

https://github.com/sutble/netflixlingo