The speaker claims this is the first US sanctions against ownerless smart contracts and open source software. Usually sanctions target a person or legal entity, who has the right to appeal and challenge a sanction. In this case, the speaker notes, there is no person behind the sanction that can appeal it. The speaker goes on to discuss the implications of these actions and whether it breaks the 1st and 4th amendments.

I would recommend watching the video as the speaker is well educated on the subject of law and blockchain, but you can also see an article on the sanctions here[1].

[1] https://uk.style.yahoo.com/government-takes-tornado-mixer-ma...