I've followed the Mark Lauren 90-day bodyweight challenge with good results (using his book) - didn't loose weight (wasn't trying to) but got a lot fitter. It's about 30 minutes of training plus warmup and cooldown so the total time invested is more than that.
The best workout is the one you'll actually do; I suspect this program is appealing to the crowd that figures they can fit in 7 minutes, but not 30.
You could say it is optimized to give the maximum full body workout you can do in a limited space with no additional equippment (except for the VR headset of course).
I top out at 17.9 kcal/min tracked with a Polar H10 chest strap and the vrhealth institute app.
Here is a shorter workout of last night  it's 328kcal in a little over 18 minutes.
The game has the very <s>inspiring</s> name VRWorkout 
The 2018 guidelines of activity for physical activity for general health  are the following:
* 150 to 300 minutes per week of moderate-intensity aerobic physical activity, OR;
* 75 to 150 minutes per week of vigorous-intensity aerobic physical activity, AND;
* Resistance training of moderate or greater intensity involving all major muscle groups on 2 or more days per week.
: (PDF warning) https://health.gov/sites/default/files/2019-09/Physical_Acti...
Definitely going to check Mark Lauren out. Thanks for the tip! The 7-min workouts tend to work best for people who are too busy for 30-min workouts, or they are looking for something to "mix it up." For instance, they've been doing the same ab workout forever. Our 30-day ab program delivers a new 7-min ab workout every day, so you learn a lot of new moves!
And found this:
I can feel my cardiovascular fitness is far better than before I started, I lost a fair amount of body fat too. I was fairly fit before though. This scheme, as well as supplementary pullups on a doorway bar seem to give me at least some amount of decent exercise. Can't wait for the pools to open up again though, I love swimming.
 - https://campbellmgold.co.uk/archive_health/5bx_cmg.pdf
I mean the first exercise is bending forward 2(!!!) times in 2 minutes.
I failed chart 5, 2 days in a row 30 days ago and have only been doing chart 4 since then, but I exceed the A+ requirements (this morning: 32,24,50,45,450). Tomorrow will try chart 5 again.
Although personally I aim for 15-30 minutes a day if I can only do minor workouts or 1-2h every other day if possible.
I wouldn't replace my current exercise routine with it because it wouldn't be enough to even match the 2018 physical activity guidelines for Americans :
Plus the convenience probably helps to get people over the initial hump and used to a daily workout, and they can expand from there
And yes what we are hearing from folks is "I can't say I am too busy for a 7-min workout.." so that kinda gets them activated. From there we are hearing that people "tend" to make healthier decisions for the rest of their day. "After doing our workout my wife and I decided to go play tennis..." or, "since I already had my running shoes on, I decided to go for a jog." stuff like that. Users describe it as a "springboard" to healthier decisions.