Beer School: how does barrel ageing work?

Here's a new fun informative video from the good folks at The Craft Beer Channel and their Beer School series of YouTube videos. 

"Once upon a time all beers were barrel-aged. Now we have big metal fermenters and kegs instead, but some brewers are going back to the wood.

In this episode of Beer School Jonny visits Brewdog and Siren Craft Brew to talk about barrel-aged beers – brews given extra depth by time spent mixed with wood and spirit.

This alchemy creates some of the most complex and exciting beers in the world."