No offense, but that's a terrible video.
The first part where he added room temperature CaCl2 and the temperature rose, was likely due to the water absorbing the heat from the salts.
Next, he tries to tell us that you "dissolve" ice in salt water. The ice still melts as always when the temperature exceeds the melting point. Its just that the water then mixes with the water that already has the CaCl2 dissolved into it.
If you really want to go hog wild on this topic, check out what the slightest amount of contamination can do to affect an ice bath, read:
Reproducibility of the temperature of the ice point in routine