For this video I generated a subtitle timestamp .vtt file using the whisper speech to text model. This Video is a test: how do subtitles work in peertube.

1. generate a subtitle file using this command: whisper videofile.mkv --output_format vtt --language en --word_timestamps True --highlight_words True
2. I imported the .vtt subtitles into the video-editor kdenlive Project>Subtitles>Import Subtitles File
3. I modified the appearance of the subtitles: Font-size and outline color (pink)
4. I set the video resolution very low for testing purposes. And rendered the video with subtitles.
5. upload the videos, in the captions tab you can upload your .vtt captions file and select the language.

If you want to know the name of the zooming application used in the video, its the "boomer zooming application" a github repository of the "boomer" zoomer application made by tsoding

In the Video I explain the basic user-interface of the video editor.