At 5:45 Andy Rouse said the video " is about all camera systems ". The video is not championing M43.
Leica, Canon, Nikon, Fuji or Panasonic L mount camera can use high ISO and deliver an image many magnitudes better than M43 due to format size.
From the composition of his photos, one can observe that Andy Rouse is a good photographer.
He just happens to use M43. He could have taken those photos using Leica, Canon, Nikon, Fuji or Panasonic L mount camera.
I am still of the opinion that M43 is not a professional format. Any one else is entitled to their own opinion.
The world wide market share (extremely small) proves that M43 is rejected by most consumers.
This fact cannot be disputed.
M43 is acceptable for hobbyists who already bought into the format long ago. (sunken costs)
But for professionals, it is a no-no.
At the Olympics pro photo coverage, M43 is almost absent.
The White House photographer does not use M43.
The photographer for the Pope does not use M43.
Most media newspaper reporters are not equipped with M43.
Eventually M43 will DIE. That is normal progress of technology.
Otherwise all of us will still be using 5¼ inch floppy discs in 2023 and beyond.
At 2:36 and 5:17 of the video, he said "I don't care".
But I do care. About noise from high ISO.
To each his own. He is entitled to his opinion.
At 7:25 he said about the photo of leopard " this is well before mirrorless ".
That means one or some of the photos were not taken with M43.
Thus his video is not about endorsing or blowing the trumpet for M43.
He likes to use Noise Removal software in post processing.
Like Topaz, Photoshop Enhance, DXO.
Presumably he is shooting all the photos in Raw.
He is generous in sharing his tips.
Like- to err on bright side and don't under expose.
Like - choosing the time of day to get the quality of light that you want. (short while after sunset) for certain animal subjects.