I think he's referring to the incident where Google decided to throw out all applications from caucasian and asian men back around the beginning of 2018. They were directed to “purge entirely any applications by non-diverse employees from the hiring pipeline". Non-diverse meaning caucasian or asian men. They had a diversity problem so they decided to "solve" it in the most racist way possible. They also had another program to assign interviewers based on race and gender to match the applicant. Rather than trying to increase their hiring pool to cover some of the implicit bias they just decided to double down on the racism.

https://www.theverge.com/2018/3/2/17070624/google-youtube-wi...