Hi, I am new to Psychtoolbox here. I am currently using MATLAB R2020b. I want to play a movie and start recording from my camera at the same time. From what I see running VideoRecordingDemo, there seems to be a delay before the recording starts. How can I make sure that they both start at the same time? Also how do I make them end at the same time? I am using a Macbook Pro so the camera is internal.