I like this video, yeh it's not in a fancy workshop with fancy lighting but he gets straight to the point with everything and shows you what the issues are with the Subaru EJ boxer engine without any frills. It's ideal for those that don't understand how the 2.5 boxer engine works and the common issues with it.

 

Watched half of it, looks a good video. Shows importance of a coolant flush. I like videos like that, lets you see all the engine. And some common issues to try and avoid.