Which video is this, please?
They talk about Rising Sun first, so you can fast forward a bit: https://www.youtube.com/watch?v=c-tDgvPt2Gw&feature=youtu.be...
I love the suitcase idea, but I'm not convinced sleeved cards will fit into the tin with ease. Another problem is that the suitcase tin has rounded corners. Rounded corners may crumple/crush the corners of sleeves, which in turn make damage cards over time.
If you watch the video, there looks to be more than a centimetre's worth of clearance on the ends of the suitcase. I don't see this being a problem at all