photography

When I took this picture:


I was not satisfied with the color of the sky: the sky in front of me was purple, but my camera seemed to see it otherwise.

Then I took another one, further up in the sky:

and the color seems to be somewhat more faithful.

Why?

videos filling up my HD

My HD is getting full due to my recent videomania. The files are in AVI, and take up about 100MB/minute. I suspect that the compression could be better. Is it easy to convert to a more compact format?

Also, is there a non-publically viewable version of YouTube?

Also, any recommendations for lightweight video editing software?