Probably all breeders get that over crowder look - the video was made no doubt to show off all their stock. A good breeder wouldn't be able to maintain that number all the time for health reasons - i'm assuming.
I agree the place could be cleaner & you'd think it would be for the video. A major point is no one sees their own 'dirt' like the rest of us do. [so check your photos carefully! - my boys make a mess of their cage floors with lots of greens - some photos look like i never clean

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I did like the clothes hangers idea they used as a hanging perch. The birds all looked great - probably a late spring video.
I remember finding some info on how many birds per square ft you should have - but i'm having a hard time locating it right now......
Overcrowding is a serious issue. Even if it is 1 or 2 birds in a too small cage.