To turn off captions for videos on Facebook Mobile, you can follow these steps:
1. Open the Facebook app on your mobile device.
2. Tap on the three horizontal lines in the top-right corner of the screen to open the menu.
3. Scroll down and tap on “Settings & Privacy.”
4. From the expanded menu, tap on “Settings.”
5. Scroll down and tap on “Accessibility.”
6. Under the “Vision” section, tap on “Subtitles & Captioning.”
7. Tap on the switch next to “Closed Captions + SDH” to turn it off.
By following these steps, you will disable captions for videos on Facebook Mobile.