So if I boil water and then let cool for 5min is that OK?
Ive heard that too much heat can also destroy the tube.
Where did you hear that? I've heard of a lot of enthusiasts using this method...it's silicone/PVC/vinyl based tubing, so really the only damage would be possible cosmetic changes like clouding. However, I haven't heard of this being an issue...boiling water isn't anywhere near hot enough to damage tubing- you only want it very hot and pliable to fit over a barb.
For the video, it's probably the XSPC kit tubing, which would match the fitting size being used. It looks like the correct size match.