That's because the video is delayed as well, to match the audio latency. AirPods switch between Headset Profile HSP) (low latency, mono, best for voice) and Adv

That's because the video is delayed as well, to match the audio latency. AirPods switch between Headset Profile HSP) (low latency, mono, best for voice) and Advanced Audio Distribution Profile (A2DP) (high latency, stereo, good for music) to accommodate both use-cases.