"The ontology is made available by Google Inc. under a Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) license." -- Github page[0]
Looks like the... tag names? and example urls have been released, but the videos and sound are under their respective licenses -- ie, mostly the standard Youtube license.
This is neat. Can a ML model developed on this dataset be used for commercial purposes? I guess, at minimum, the paper and tag list are provided as help for those corporations that would wish to build/use a private dataset for similar purposes?