Michael Fremer's system

"in that space he will get nothing better than mediocre sound"  - interesting statement - I guess you have been there and heard it.

"mediocre sound" is almost certainly exaggeration, but he is unlikely to get great sound in that room.

Ever try to race a Ferrari on a Go Cart track?🏎

I am not at all sure the point of the video was to convince anyone of anything. On your suggestion I watched for about 6 minutes, then I I put some music on and opened another bottle of red wine and relaxed....