Watch this video first without skipping anything:
And then watch this video in the end
Okay.
About brightness,
Luminance measurements should be taken on center and all four corner. Total 5 measurements.
In 1st video, Vineet's review, i can see value rising from that Luminance meter
In 2nd video, techiebeez, same thing.
1st, Also brightness was tested on screen center.
2nd, not tested on center
TBH, I am no expert.
But may be Techiebeez channel got defective product. Or Vineet Malhotra was targeted by Toshiba brand and they indirectly send that quality TV.
Also recently I am also facing used product delivered by Amazon (i returned all, but all products were below ₹1000)
Also there are no in depth reviewers for tv in India.
Showing all colour testing, settings, all content.
I checked this review too. But this TV is different. Just like TCL in India and abroad.
*www.rtings.com/tv/reviews/hisense/a6h