Sony BD/DVD Player Movie Repeat/Loopback
You will have one of the remotes shown below for your Sony BD/DVD Player

In order to put movies on replay, select the "option" button towards the middle right of the remote. The button is to the right of the blue home button.

Once the option menu is selected, you'll scroll up until you see repeat settings. Select that option, then an option for video should pop up, select that and the first option that shows up which should be DVD or something similar. Once it is selected, you may exit the options menu.