This task can be performed using Seikai.TV
The Best Way To Learn Japanese Watching YouTube
Best product for this task

Seikai.TV
edtech
SeikaiTV extracts, translates and organizes Japanese vocabulary from any YouTube video.
What to expect from an ideal product
- Records Japanese words while you watch YouTube videos and saves them with their meanings
- Creates a personal vocab list from your favorite Japanese YouTube content
- Shows word translations in your language as pop-ups during video playback
- Turns any Japanese YouTube video into a learning tool by extracting key vocabulary
- Builds your Japanese vocabulary library automatically without manual note-taking