Can I use Khan Academy Images to create a Free Educational Resource??

I am an AP Biology teacher at a high performing independent school. During Covid I created screencasts for all my lectures and now I have completely flipped my classroom. I am creating a free educational resource that I would like to post on my youtube channel with notes that correspond to each of the screencasts. I'm curious of if I can use Khan Academy images for this purpose? 

Any help, thoughts, or suggestions would be greatly appreciated.