What is meant by "Video Sample Size = 24 bit"?

In the video properties for a XVID file you can see "Video Sample Size 24 bit" included with bitrate, frame size, but "file size in MB or GB" omitted.
What is this Video Sample Size? Is it the same as "bit depth, also known as color depth" that relates to the number of bits used to represent the color of a single pixel in an image?
I know how to calculate/estimate the file size of a single image from bit depth information such as 12 bit, 24 bit and frame size, but can you calculate the file size of a video from it frame size, bit depth? Question is based on Video Sample Size really being equal to bit depth.

Yesterday seems to have been a bad day for the Adobe fora. I had three very similar instances of what Tony experienced. I'd be reading/posting in the Premiere CS3 forum, and when I'd hit Post, after the screen came back, I'd be in the CS2 forum, and that's where my post would appear. Similar behavior in several other Adobe fora too.
Some of the screen displays got very wonky, and I had one of those today. When I went to open an article in one of the fora, there was one reply. I posted to that, and when the screen came back, about 8 replies displayed! All were from days before, but had not shown up, until I posted.
I might have helped Tony out in the forum that he intended to post to. Maybe Jeff, or someone can clean up a bit. I think there will be a lot of this, and I'm not sure it's working smoothly yet.
Hunt

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