Unfortunately they don’t seem to allow embedding videos, but the clickthrough is worth it.
Combining two of my favorite things: science communication and open science! The effort has been largely spearheaded by the ASL-STEM forum at the University of Washington, which lets users contribute their own signs for various science words.
I really like the idea that having two distinct, new signs (mass vs weight, in the link above) can give deaf students an advantage in situations where the English words have some historical ambiguity. Makes me wonder what other pairs might be out there, and when the deaf scientists will exert their power and take the rest of us by storm.