YouTube Caption Definer - English is a Chrome add-on designed to facilitate language learning for Russian speakers studying English through YouTube videos. This tool allows users to click on video subtitles to obtain immediate definitions, translations, and examples of selected words. This feature eliminates the need to pause the video and manually input each word into a translator, streamlining the learning process.

The add-on supports the selection of multiple words, making it a versatile tool for users. By integrating seamlessly with YouTube, it enhances the viewing experience while providing educational resources. This free tool is particularly useful for those looking to improve their English vocabulary and comprehension through practical exposure to the language in video format.