A simple Video Editing and Colour Correction work. I have split each frame capture with the raw footage on the left and the final output on the right so you get a better feel at the before and after differences.
The comparisons are ordered by required post-production levels, with light touches at the beginning and heavy editing towards the end. I tried to get each shot as close to natural as I could, a hard ask considering the low bitrate files delivered by the client.