Never feel lost watching YouTube again

Gloss knows what you don't know and shows explanations on top of the video you are watching.

Get Gloss - It's Free

Help others discover Gloss

Browser extension for YouTube

Also available on

Don't just watch. Learn.

Gloss picks up on words and ideas you might not know. When they come up in the video, an explanation appears in the top right corner of your screen like a notification—so you don't have to pause and search for it yourself.

Understand Anything Instantly

Quickly explains words, concepts and abbreviations. You'll always know what something means.

Context-Aware Explanations

Gloss understands the video's subject matter. A "cell" means something different in biology vs. programming—Gloss gets it right.

Learning Mode, On Demand

Pause or activate Gloss video analysis anytime with Alt+Shift+G or through the extension icon menu. Switch between learning and leisure mode in a second.

Stay in the Flow

No need to pause videos to Google a term. Stay focused on learning while Gloss quietly handles the research in the background.

Get Gloss - It's Free

Loved by learners

“Instead of having to re-watch long videos that take up too much time, this extension breaks it down for me easy and effectively. This also helped me retain more information from each video, making it easier as a student to learn more in a short amount of time. Overall awesome extension :)”

Alexia B.Medical Student

“I watch a lot of tutorials and tech talks, and most of the time speakers mention a word I don't understand but assume I do, this helps a lot!”

Thomas P.Software Developer

“Learning finance through YouTube was rough. Every video assumed I knew basics I didn't. Gloss fills those gaps automatically. I'm finally keeping up with the content instead of pausing every 2 minutes.”

Sarah K.Self-Learner