There’s a one-frame difference in the current ESB video. There are also always minor ADR issues, such as when the take used for the video isn’t the same as the take used for the audio (or even when they’re not saying the same words in both takes, which does happen in Empire). Also, some PC playback software has a decoder delay for certain codecs. I’ve seen the exact same track encoded as DTS-MA and AC3 be both out of sync and in sync, respectively. Use a hardware player to be sure.