SAN FRANCISCO — Striving to knock out a class action, video streaming site Hulu insists that viewers who have sued the company under a 1980s video privacy law cannot win damages because they have not actually been injured.

A would-be class of viewers allege that Hulu wrongfully shared their viewing selections and personal information with Facebook and data analytic firm comScore. The practice violated the Video Privacy Protection Act, which bars video providers from disclosing customers’ video selections and personally identifiable information to third parties, plaintiffs lawyers at Parisi & Havens, Strange & Carpenter and KamberLaw contend.