I don't know how new you or your team are to tournament paintball, but if you're fairly new then they issue is not what type of drills to do, but to make sure you are doing things correctly. Most new teams will need some outside influence to ensure they are not practicing the wrong techniques... a LOT of teams out in paintball training land continuely repeat the same bad techniques over and over again; its a real issue in this sport.
So, if you feel like you would benefit from some outside input then DVDs are a fair start, but real life one-on-one coaching is so much better. The only problem here is that you don't want people who think they know what they are doing teaching you more bad habits. Your best bet is to try to hook up with an international team or GOOD domestic team and see if they will invite you along to a training day and show you the ropes. Or look out for a clinic from a Pro team and attend that - worth there weight in gold (or DVDs)!
To provide an example, the guy who has posted above me really shouldn't be offering advice... its the blind leading the blind and not condusive to helping new talent develop at the rate they want and we, as a sport, need.