Descript has a cool feature on their Fancy Captions feature where you can highlight the words in your captions as they are being spoken in the video. As the person speaks the word, the word in the caption is highlighted in another colour.
This is great for making all-text videos like a VSL, or just making captions/subtitles more engaging and interesting. I see this feature being used a lot in ads and social videos.
See attached example of how this looks.