Version 2.5
Features:

• A fixed-positioned box containing the links to the movies is inserted in the bottom-right corner (see screenshots below)
• Now even links to movies which they embed dynamically! (should reduce bug reports by 99% :-)
• No longer distinguishes between HD, custom or default trailer pages. All 3 are processed the same way

Check out the screenshots to see how this userscript works:

Updates:

• 08/11/2008: Handles new default trailer page. Still some issues with HD trailer links though.
• 12/21/2007: Updated to correspond to Apple's new url pattern.
• 09/11/2007: Bugfix (Ironman), thanks Antony!
• 07/07/2007: Some people report Firefox crashes when this script is used in conjunction with VLC media player plugin (and possibly other player plugins as well).
• 06/25/2007: Bugfix, thanks daniel!
• 03/19/2007: Fixed the slow burn bug
• 03/02/2007: Bugfix, thanks nitro322!
• 02/25/2007: Release of v2.0