this guy is sort of wrong. I mean, there was a tging that he didnt explain. Cross type foxes are red foxes, they sure are but they are a baby of a ordinary red fox breeded with a fox called silver fox, which is completly black due to a lot of melanin in their fur.
No, they're not. It's not a cross breed, it's a genetic variant, just like they explained in the video. Check this out: en.wikipedia.org/wiki/Cross_fox