In 2016, Digiday reported that 85% of Facebook video is watched without sound. Insert captions!
You’ve watched plenty of videos with captions. Some of them you can choose to put on, some of them are a part of the video file itself, and some of them automatically appear like when you are scrolling your news feed on Facebook. This video will show you how to put the ones onto your facebook videos in the EASIEST MANNER. (Because as mentioned, there ARE other ways but they are more difficult and take longer).
Hope this helps!