1. A Stingray is not synonymous to a GPS tracker (placed knowingly or otherwise.)
2. North Carolina, stupidly made the argument that a GPS tracker is not a search, despite various SCOTUS rulings otherwise.
3. SCOTUS reiterated it's previous position on GPS trackers and sent the case back to NC.
At no point in time di the SCOTUS make any ruling that would impact anything other than the assertion that a GPS tracker is not a search. Chances are that NC will revise their argument and dude is still going to have a GPS anklet for the rest of life. This is not some revolutionary ruling from the SCOTUS.
Yes, Stingrays are a worrying technology (even more so, law enforcement's general ambivalence toward any public concern), and I certainly don't believe proper privacy safeguards are in place, but this ruling has nothing to do with them.
In short, yes, the DMCA has virtually eliminated fair-use in many situations, not just on YouTube.