Why is the audio choppy from my Canon 70D?

Episode 1144 (42:37)

Dale from Brooksville, NY
Canon 70D

Dale has a Canon 70D that he uses for video at his church. He made a 4 minute video and when he loaded it on his Mac, the audio was really choppy. Could it be because it was recording at 160p? Leo says yes. The Mac is having trouble handling the frame rate. He could probably burn it to a DVD, and it would be fine. But it likely just can't keep up with playback.