Some YouTube videos come with captions. If you're posting a video in French or Serbian then it might not be a bad idea to turn on the English language captions (if they exist)
Unfortunately YouTube's default embed code these days does not include any of these options, as it's a rather simple iframe
You can, however, add the captioning to any video if you use the older style embed code.
YouTube's help docs here explain it - you'll just need to ensure that you add the full code snippet / tag to your embed code ie. "
So your code can end up looking a bit like this:
<object width="560" height="315"><param name="movie" value="http://www.youtube.com/v/C0tUDIyDLZk?version=3&hl=en_US&cc_load_policy=1"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/C0tUDIyDLZk?version=3&hl=en_US&cc_load_policy=1" type="application/x-shockwave-flash" width="560" height="315" allowscriptaccess="always" allowfullscreen="true"></embed></object>
Which will render this:
Posting this more for my own usage than anything else 🙂