I would venture to guess that "might" be dependent on connection, if I'm to believe this is indicative of the DAC, which I don't believe. At the moment I don't have a Denafrips DAC (planning on getting both the Pontus and Artemis at a later date) to verify this, but I highly doubt that.
Can you provide a link to said video?
Anyway, as a hardcore gamer who also builds his own high end gaming rigs...I'm not buying a DAC for gaming!!! That said, my current Teac UD-503 DAC connected to my PC via USB has zero issues with audio from games. However, the main purpose of the DAC is music