Numberphile is self described as “Videos about numbers – it’s that simple.” (I also have a bridge available for sale.)
Topics include Problems with Zero, One Minus One Plus One Minus One (which starts to look a lot like Schrödinger’s Cat), The Remarkable Way We Eat Pizza (looking at topology) and Infinity Is Bigger Than You Think (how many different types of infinity are there?).
A great resource for tying math to the “real world”.