Episodic Buffer

so I was studying for the exam and I was up to the aspects of working memory. I sort of understood how they all worked until I got to the episodic buffer. I searched and searched to find an easy way to wrap my head around it and I found a video that describes the buffer as Legos. Just thought it would help with remembering how to describe them, after all a majority of our studying is how to get all this info into our LTM.