Playing Quicktime movies saved from the temporary items folder


So I went to Apple's site and watched a few trailers. After watching the Monsters, Inc. trailer for about the 100th time, I decided I wanted to keep it, so I got Tinkertool to make all my invisible files visible and found the Temporary Items folder. Actual path is /501/Temporary Items but I could only get to it by clicking on the /temp folder. Anyway, I found the downloaded file and copied it on to my desktop and played it. The problem is, about 3 seconds in to it, it made a screeching sound and went black for a few seconds, then played normally. Is this normal behavior for quicktime movies downloaded and played through the browser's quicktime plugin? Some sort of copy prevention? It played fine when I clicked on it from Apple's website.