That is very useful indeed! Thank you, I always had problems properly downloading videos for lectures. I have VLC installed. To use the video in my slideshow I found the following command quite useful:
Button["Play Movie",
Run["/Applications/VLC.app/Contents/MacOS/VLC --fullscreen --input-repeat=0 --no-osd --no-video-title-show -L ~/Desktop/video.mp4"]
// Quiet]
It produces a button that opens the video in full screen.
Marco
