I recently discovered some extensions for Chrome / Edge that let you see two subtitles on Netflix and YouTube at the same time. This is a really useful when you want to take a closer look at the language being spoken.

This is the link for the Netflix extension called NflxMultiSubs.

This image from the webstore link above.

This the link for the YouTube extension called YouTube Subtitles Simultaneously.

This image is from the webstore link above.