If you usually turn the captions feature on when watching YouTube videos, you can set it to always show captions by default.
A friend of mine likes to continuously play YouTube videos at his store; however, he always plays them muted. Using these settings I helped him be able to always show captions for these videos. People who are hearing impared may benefit from this setting as well. Unfortunately, the automatic captions are not very accurate yet.
1. Log in to your Youtube account.
2. Click on your account name and choose Settings.
3. In the Account Settings page, go to Playback Setup.
4. Check Always show automatic captions.
5. Hit Save Changes.