Youtube English Subtitle Extractor is a free Chrome add-on developed by Bill Lin. It falls under the category of Browsers and subcategory of Add-ons & Tools. This program allows users to extract English subtitles from YouTube videos and save the uncommon words found in the subtitles.

With Youtube English Subtitle Extractor, users can easily extract the English subtitles from any YouTube video they are watching. The program then analyzes the subtitles and identifies uncommon words that are not commonly used in everyday language. These uncommon words are then listed for the user to review.

The main feature of this program is the ability to save the uncommon words. Users can choose to save the list of uncommon words for future reference or for further analysis. This can be useful for language learners or researchers who want to study the vocabulary used in YouTube videos.

Overall, Youtube English Subtitle Extractor is a handy tool for extracting and saving uncommon words from English subtitles of YouTube videos. It provides a convenient way to analyze and study the vocabulary used in these videos.