Access m.youtube.com on your smartphone or tablet, go to the page of the video you want to play, and tap the Trancy floating button on the right side of the video page to enable it.

Double-click on words on the webpage with a single finger to trigger the word translation feature.

Tap the screen three times in succession with two fingers or tap the Trancy icon on the side of the screen to enable immersive translation.

Tap the sentences and paragraphs you want to translate twice in succession with two fingers to enable sentence or paragraph translation.