The script should be able to pass the 301 views and 100% working. Only bid if you done something like this in the past or know about Youtube. The requests youtube server sends contains many variables like PLID and other stuff. You should also find a way to generate them automatically each time.
There should be an option to add custom referrer. That script should be able to provide high retention views [with 90-100% WATCH time]. This script will basically send a request to youtube server telling it that it has watched the full video without actually seeing the video.
Must provide upto 50,000 YouTube Views per day.