I have used those al cheapo's like forever and I am still using them, but I am going to buy a Brymen anytime soon. The video is very funny and the result is very suprising, I like it.
I still think those meters are crap (but not useless). Try to remove the pcb and reinstall it. The lcd won't work again. Or try overvolting the inputs. Don't hold the meter!
Also, these meters aren't all the same. Everyone is different, and I think the newer ones are worse The trick to the robustness is of course the low component count.
Before I get a Brymen I am going to use the Victor/Sparkfun VC830L, another el cheapo, but recommended here on the forum:
https://www.eevblog.com/forum/testgear/sparkfun-multimeter-teardown/