Zd542, I do think you and Andrew Robinson would make good "Woods mates", should you be lost in a forest! -just go with whatever. (or maybe instead of simply rebutting on my statements, perhaps you could point out some specifics of what's seen on the videos, and comment and recommend in regards to those, no?!)
Lemme make my position real clear... If your average AV enthusiast, hobbyist, or DIY simply picks the ball up and runs with it, after watching these video's, more often than not, the end user's results are going to be poor picture quality and low-fidelity sound quality! PERIOD! Overall experience will be nothing special, in fact, likely lack-luster, at best! ..good results are going to be more involved and knowledge/experience intensive, regardless.,
In case you need me to expound more on my position (no, I don't need to get you a colorimeter and sound meter out to show/tell you what the readings will be! - but guarantee everyone sitting in the theater can easily identify that things aren't so great looking or sounding, and that things could be overall much better, guaranteed!) -What is compromised pic quality, you ask? Um, the black levels are grey, the contrast is poor (with washed out color and contrast, loss of shadow detail), due to white colored ceilings and floors near the screen surface (untreated)! IMAX picture quality? Yes, you'll need 4K projections and processing (source material?), and sitting closer than 40% viewing angle, will require such! -although, yes, some could argue that some JVC,Sony,Panny 1080p's, with their tight pixel structure and processing are viewable at such close distances, perspectively. Still, every other 1080p projection tech will show easily discernible pixel structure, distracting during many instances from a projected image. But make no mistake, IMAX calls for 4K, not 1080p!
What is low fidelity sound quality? Hugh holes (main issue in bass response ) and peaks in the frequency response of the bass, improper reverb and tonality from any given seat in the room, dead/lifeless sound + poorly delineated sound stage, smeared imaging from the soundstage/loud speakers, one speaker booming in your ear on far end seating locations, phase issues, hole in the crossover frequency for mains vs sub from seating positions, lack of dynamics and impact due to improper loud speaker selections, locations, and settings, overall bombastic, uneven, bright in some spots/rolled off in others tonality, and so on.
Also, no, someone cannot simply put loud speakers "where they think they should go", and or chose "whatever equipment they have laying around"-implemented in a given space - and expect great results that will wow their friends, and stand as a reference against anything QUALITY! In fact, enthusiests and weekend warriors have been doing this sort - WITH POOR RESULTS - for years!,...and my experience is they fail miserably in any quality attempt. .. Might as well get a flat screen and a sound bar (in fact, they guy recommends one in the videos!!!) and forget about it! -er maybe some Bose. Whatever works, you know. after All, who's to say your Beats headphones and sitting 1 foot from your computer monitor isn't as good?! ...I always say, anyway. George Lucas would be impress, regardless, I'm sure.