> Why are you conflating “valid legal request” with subpoena? If they meant ”in response to subpoena” then they would say subpoena lol

Because they also comply with warrants and court orders, and it's easier to say "valid legal request" than that. Probably the vast majority of data requests are subpoenas.

I suppose that a FISA court could try to get footage from Waymo, but it would be difficult to do so because FISA requires a reasonable suspicion that the target is outside the United States. The (terrible) decision to allow dragnet surveillance with PRISM was allowed because the government claimed that it would be targeted mostly at people outside the borders of the US.

Needless to say, data from a Waymo operating entirely inside the United States is not covered by this. Secret courts are a bad idea in general IMO, but according to the rules this should not be allowed.