Well to be honest i was just eating some (from Mc) when i thought i might google to find out how it's made.
I did not really like it lol, and I later learned that McD. does NOT produce it's chicken McNuggets the way it is shown in the first video any more - not since some years, that is.
But pre-processed nuggets ARE made of this "pink slime" as the industry itself calls it, don't know of other fast food restaurants though.
In those endless sausage they put all in, from claws to eyes, innards, bones scraped (the latter is even ok i think compared to the others), but then this pulp is swarming with bacteria, which is why again it is treated with ammonia and antibiotics. Ammonia gives it a strange smell and taste (but it's still in it!), so it again is treated with (artificial) flavours, salt and lots of sugar.
So talking about an opinionated vid is certainly right, and it is indeed my opinion that i do not like it - especially when i buy this as a so-called high quality ("master") food for a LOT of dollars. Nothing against using all and being against this "throw-it-away mentality", but especially when you look at Wendy's or McD.'s package cult of blown up plastic and paper around a little food you cannot really say that this all is done to be sustainable or environment friendly.
I had a McRib yesterday, but i better not research what is in there ..