How long does it take a package form the netherlands to get to the USA?

You have already had a few good answers to this question, although I though them a little positive. If your DVDs are beyond what is allowed in the USA, you might well not get them, you could even get an invitation to report to the legal system instead. But if the DVDs would be legal in the USA they will be delivered. It mostly take about 6 to 9 weeks with the normal post, registered. But if it is busy or if there is something strange with the package it can take a few weeks more. And customs inspect most packages, they can easily hold a package for a few weeks so a superior officer can asses it. 3 months is not strange, longer times have happened. If you are that worried about getting them send from the Netherlands, do not buy them here, go to a shop in the USA and buy them there in person. This is all assuming that the dealer is real and legal and not just taking your money and claiming the package has gone lost in the mail. If he is not good, there is no way you can get your money back, as long as he can 'proof' he send it off.