For me, the answer would be, "Can you use an image from a Chakuero video as a forum avatar?"
I believe the answer is "Yes", because it is non-nude. Therefore, why are you not using one of those images as your avatar here on Akiba-Online?
I found your thread on Chakuero. do you have your own list you could pass along with the titles you're come across that pertain to that genre? Feel free to PM me