Question: Is there a language learning platform that allows me to save and review words I don't know from videos I watch?

If you want a language learning platform that lets you bookmark and review words you don't know in videos, Language Reactor is a good option. It pulls from media sources like Netflix and YouTube and offers tools like dual language subtitles, popup dictionaries and word and phrase saving. You can also pay for its Pro Mode for dubbed movie subtitles and machine translations, so it's a good option for language learners.

Another powerful option is Trancy, an AI-powered language learning assistant that works on multiple video sites including YouTube and Netflix. It offers bilingual subtitles, AI-powered tools for word and sentence analysis, and immersive translation. You can bookmark content for later review and customize your learning with custom learning decks, so it's a good option for language learners.

If you want real-time translation as you watch videos, InterSub is a good option. It works on popular video sites like YouTube and Netflix and offers word translation on the fly. With features like dual subtitles mode and a personal profile, you can explore and save words you don't know as you watch videos. InterSub offers support for 30 languages and several subscription options, including a free trial.

Last, eJOY offers a more complete solution for English learners. It offers dual subtitles for videos, an AI-powered dictionary and an intelligent review system with interactive games and spaced repetition algorithms. eJOY also offers English communication courses to help with reading, writing, listening and speaking, so it's good for students and professionals.