How can I get AB repeat functionality on iTunes/Mac OS X?

"You can do this with the Quciktime Player.

Select the section that you want looped using the sliders on the progress bar or the keyboard shortcuts, and choose ""View->Play Selection Only"" and ""View->Loop.""

Selection keyboard shortcuts:

Move In marker to playhead location ""I""
Move Out marker to playhead location ""O"""

"I've been trying to find the answer to this when playing DVDs in DVD Player & just stumbled upon the answer just now. You use Video Clips!

It's a little more fiddly than the A-B repeat function but it works out to the same thing, & you can have multiple saved.

When playing the part you want, go to ""Controls -> New Video Clip"", a little window will pop up with the main video on the left.
Underneath that, on the left are three buttons with arrows, rewind, play and fast forward, left to right. Set the video to where you want it to start, then on the right, click the ""Set"" button that's to the left of the box that says ""Start"" above it.
Then set the video to where you want it to end, then click the ""Set"" button that's to the left of the box that says ""End"" above it.
Give it a name, then click ""Save"".
Open ""Window -> Video Clips"" & double click on your saved video clip.
To repeat it, go to ""Go -> Video Clips -> Repeat Clip"", the clip has to be playing or paused to select this otherwise it will be greyed out. You'll notice there is ""Exit Clip Mode"" there as well, which will return to the normal playing of the DVD."