The camera is not HD, it's 2.3MP 3 CCD.
I see it from computer monitor.
I don't know if it's related but I have lots of divided screen and keying effects. Can this be the reason for 7 GB?
Where that color problem happens is black and white. Edges become yellow while moving object.
In project settings I see editing mode:dv playback, 25fps. Frame size:720Hor 576Vert. Pixel aspect ratio

V1/DV PAL(1.067) (I'm outside USA), Lower Field First. Title safe area: 20% hor 20% vert. Action safe area is same. It's captured by 1394. Rendering comp:dv(pal) and millions of colours.
When I exported as movie its settings were type:microsoft avi. Non compressed with millions+ color. Frame size 720h 576v 4:3 25fps. Pixel aspect ratio:d1/dv pal(1.067). Not limited data rate and recompress. Rendering lower fields first.
When I export to DVD, I made custom preset which maybe I made everything maximized like
Comment: High quality, CBR transcoding of Progressive-frame content
Video Summary:
Codec: MainConcept MPEG Video
Quality: 5.00 (high quality)
TV Standard: PAL
Aspect Ratio: 4:3
Frame Rate: 25 fps
Program Sequence: Progressive
Bitrate Encoding: CBR
Bitrate (Mbps): 9.0000 (high quality)
M Frames: 5
N Frames: 15
I probably told unnecessary things also. Thank you again.