Yes. Your QuickTime Movie triggers accurately to the incoming MIDI Time Code. Your Movie remains "frame locked" wherever you click on the screen (provided you followed the rules when capturing it!). Of course, as with any system that uses QuickTime, the performance of your system will vary depending on whether or not your using a dedicated capture card with a codec, a SCSI accelerator, and how much you're asking your computer to do. Faster computers with dedicated video subsystems and drives can yield great performance. As with any host-based audio system, you'll be trading off the ability of the CPU to manage tracks, mixing and effects against what it's being asked to do with video. More expensive digital audio systems (such as Pro Tools TDM systems) use dedicated HW for most audio tasks, so they can deliver better performance with a given CPU configuration. Because system performance can vary tremendously, Digidesign has not "officially qualified" common video cards (like the Miro DC30 or Aurora Fuse) for the Macintosh for use with Pro Tools LE. These cards do work... just make sure that with your workflow, there's enough CPU horsepower for what you want to do. For more on QuickTime video and Pro Tools LE, read below...