Just watch your vid,
how much in total for having mining rig exactly like in your youtube?
because seems cant find exactly that nvidia 1080TI you using
http://amzn.to/2jwsQI2 ? different with your video ?
https://www.amazon.com/MSI-GTX-1080-AERO-11G/dp/B06XXGNZB3
is the GPU he is using in the video, but like any blower card the cooling is less effective than a good fan-based card like the Aorus or even the EVGA SC.
ASUS makes a very similar model if you LIKE the blower cards, and IT tends to be in stock more regularly - and left off the DVI connector for MUCH better cooling airflow and somewhat better temps.
Shouldn't be an issue when it's being run at 80% or less of TDP (200 watts on every 1080ti I am aware of is 80% TDP, but there might be a few out there that have a default TDP higher than 250 watts) but cooling on a 1080 ti tends to get painfull if you are pushing the card and it's NOT a good high-end cooler card like the Aorus (the MSI Duke mentioned as an alternate should also have very good cooling).