Recently I went back and looked at some of my old posts. I noticed that a number of posts where I embedded Youtube videos, the videos were no longer available. Sometimes it was because of third party copyright issues, other times there was no reason given. But it is far too common that I've embedded videos to be able to go back and correct every single post where that's an issue.
Instead, I'll occasionally post the following reminder - some posts have videos that have been deleted. I apologize that some posts will not make as much sense as if the videos were available, but I am unable to correct every instance of these occurrences. Please bear with those particular posts.