I really love my LG WM3470, it has the recirculating jets and atomizer, just as yours does. I believe the feature might -- in the long-term -- become more common, as it seems like a great way to reduce water use and making the Department of Energy happy seems awfully important to these manufacturers.
Over time I've come to figure out how to get hot water washes, I just use the Allergiene cycle, which from my reading is simply a hot wash up to 131F/55C. By the way, you have it wrong somewhere (it might have been in the video of yours I watched). You said Hot was 130F, it certainly isn't. Hot to LG means a target of 104F/40C. This is true in Cotton/Normal, Bright Whites, Permanent Press, Towels, and I think Heavy Duty. Allergiene and Sanitary up that to 131F and maybe a little hotter for Sanitary (60C?) but I have no effective way of checking for certain since the door is locked once the temperature reaches anything above 104F/55C or somewhere around there anyway. I mention these temperatures as targets since that's all they are. LG are all too happy to miss the targets in Cotton/Normal, and sometimes too even in Bright Whites. I'm not certain of Permanent Press/Towels/Heavy duty yet since I haven't used those cycles enough. I have my washer connected to a current measuring device, so I know when the internal water heater is on, I can just glance over and if I see washer energy consumption in the 1000+ watt range, I know the internal heater's on.
I really wish I could figure out a reliable way to get Bright Whites to use the internal water heater. It seems like most of the time it'll engage, but not always. I haven't yet figured out what mixture of laundry weight and settings can guarantee it. For the moment, unless my whites have gotten dingy, I use Bright Whites + Turbo Wash + High Soil Level. This gives the sodium percarbonate the time it needs -- during the wash cycle -- to do its magical oxi work and thus I don't really have to use Allergiene that often, but I do occasionally just because I figure it's good for the washer to get a true hot hot wash now & then, and it's certainly whitening too.
I believe Cold and Warm will never use the internal hot water heater, no matter what. So warm, which is a target of 86F/30C, is quite rare in any part of the country outside of Florida. I often see a result of 70F during the wash cycle when Warm is selected, so I treat Warm as effectively Cold and just use it as my default temp for everything except whites. On occasion if the load is really large or Permanent Press or another water-rich cycle is selected I might see a warm that's in the lower 80's. I don't believe this temperature is at all injurious to dyes, so again, I treat Warm as a safe default for everything. Cotton/Normal w/ Turbo Wash ain't so bad as a default for small to medium-sized loads, kudos to LG. Still, I wish my washer had the equivalent of a manual transmission, as I like to control everything precisely.
Perhaps TMI but there ya go, I know you're into this stuff.