Two interesting videos on containers and problems people have run into:
How to get started scheduling containers:
This first one had the line of "Containers are great! Let's run lots of them." Which leads well into this video of the problems with containers as you scale. While the first was highly technical, what I loved about the second was that most problems he discusses cannot be solved technically... "There's people behind that text editor."
They aren't the best presenters, but the content was good.