Use the buttons above. I occassionally do image capture from video tape that will eventually be used for evidence in court. In today's video world, with digital video, doctored images are becoming more and more difficult to detect. In the hands of a skilled professional, doctoring will be impossible to detect. If the image includes people, then analyze the flesh tones very carefully.
Flesh tones are probably the most difficult color values and textures to match.
As evidence in court, the video is only as good as the creator's word. Be careful. . Also, when working in a vector program like Corel Draw or Illustrator, you can easily work on a small, scaled down version, then either enlarge as the last step, or let your service bureau do the up-scaling at the time of printing. Vector graphics enlarge with no loss or damage to the drawing quality. Nope, I really am not up to date on the rates in Europe, however setting rates should start with some basic accounting rules and assumptions.