General help

Unfortunately there is no really good way to tell the Quicktime plugin to "play the video at it's native size", so it must be pre-defined somehow. There is a parameter scale=1 but this causes problems with the control bar (ie often you see no play button).

Scaling has not been a big problem so far, because the scaling in my experiences is usually very good, and you certainly don't lose any information or slow anything down by having a video scaled up. ie it's just like moving close to the screen to better view a squinty little picture.

Here is a auto-embedded which is 240 pixels wide....it looks OK to me when scaled up to 400 wide.

Clicking on the link above will this open a new window with the video playing at native size.  This is another option for you  ... just specify "open in new window" for your link (ie target="_blank")