Sorry for my delay. I stepped away from the computer to spend some time with my family. I would honestly not be in the least suspicious of RW with those lesions. Moist, irritated wounds like that scream a bacterial component and not a fungal origin. Unless it is something like cryptoccus. But, that shouldn't be the case!
The hair is comming out so easily because the hair follicles have the infection down into them as well as on the skin. That effects their ability to hold in place and slight tension will cause them to epilate.
I wouldn't treat the kittens at this point as there is no reason too unless they start to have similar looking lesions. I would definitely speed up the weaning process. I would start to let them have access to solids - at 5 1/2 weeks, many are eating them.
Can you let me know what your vet ends up finding and how they do? I'm always wanting to know the final results.
Again, thanks for the phenomenal video! I wish all clients here on Just Answer could provide such great clips!
Don't worry about more questions!!! Fire away all you have!