Problem
A minor issue is the lack of layer grouping; I suggest adding this feature along with an option to ungroup them. There's also a problem with captions for other languages like Arabic and Chinese. In short, unsupported languages have a clear issue with captioning not working when auto-detect is enabled.
Solution
I suggest adding a ready-made fade-in/fade-out option with a single click, similar to DaVinci Resolve, along with the option to merge and unmerge layers. This is crucial. You could also add fade-in/fade-out as an effect with blur. Currently, the work is excellent and relatively stable, but it lacks some finishing touches and a bit more power. When it reaches a point close to that, I suggest color grading.
Alternative
An additional suggestion: support for pre-made fonts would be a great option. Thank you for your efforts.
Anything else?
No response