"Why put it out if you're not putting it down?" asks Williams.
"Blac Chyna, how lazy are you? Why put it out if you're not putting it down? Just saying," said Williams.
FYI: Sources close to Chyna tell TMZ she isn't the one who leaked it, while Mechie -- the man who claims to be in the tape with her -- says he gave the phone right back to her after he shot it and never got a copy.
"Totally naked, very dark areolas and prominent nipples," Williams continued, critiquing the clip. "The guy is built like a 13-year-old boy. Well, my upper arm is bigger than his thigh. Just saying."
"She was weak on the tip. And real weak on the hip. If you saw the sex tape, it's online, weak weak and weaker," she added. "And there were no condoms. Yep. Everyone's smashing!"
Williams also called out Chyna's ex, Rob Kardashian, for ever dating her in the past.
"By the way, Robert Kardashian, you so much played yourself by being with this girl," she added. "What the heck?"
According to TMZ, Chyna will file a police report about the leaked footage with the LAPD this week.