It seems like you are getting more knee jerk than actual answers here. There is no evidence of any discrimination in asking to deblur the camera by itself. It also has nothing to do with an I9 validation. The I9 validation is checking for employment eligibility and citizenship status and that's it. See below for the remote procedures. The employer's obligation is to be consistent in the procedure and not discriminatory with the procedure based on race, gender, etc. I just think that HR drone is a dumbass.

Lastly, I think based on your other response to another poster she should take the job and just be keenly aware if anyone else in HR asks other funny stuff. There can always be dumbasses in every department and that's not a reflection of their ability to be lawful or a bad company. I also think it's worth reporting the person if they keep doing funny stuff.

From USCIS: Remote Examination of Documents Procedures: Examine copies (front and back, if the document is two-sided) of Form I-9 documents or an acceptable receipt to ensure that the documentation presented reasonably appears to be genuine and relates to the employee; Conduct a live video interaction with the individual presenting the document(s) to ensure that the documentation reasonably appears to be genuine and relates to the individual. The employee must first transmit a copy of the document(s) to the employer (per Step 1 above) and then present the same document(s) during the live video interaction; and Retain a clear and legible copy of the documentation (front and back if the documentation is two-sided).

Link https://www.uscis.gov/i-9-central/remote-examination-of-documents