If you are using Flockler’s Slideshow layout and have enabled the 'autoplay' option for videos, you can choose to show subtitles/captions too. While the sound of the video can’t be played without user interaction, enabling the subtitles/captions help viewers follow what’s going on in the video.
Here’s how to enable YouTube video subtitles/captions:
Log in to Flockler
Navigate to the 'Display' tab
If you don’t have a Slideshow for digital screens yet, click the 'Add a new layout' button
Next, click the 'Edit styles and settings' link
Enable both 'Autoplay for videos' and 'Subtitles for YouTube videos' for videos
Save changes, and your Slideshow will show subtitles/captions on YouTube videos