It depends on how you want your ads to be displayed. - if you want them on the website (which I know most about), you can choose between banner, pop-up or pop-under. Redirect is another option, but Google is becoming very aggressive on publishers which use redirect, so I wouldn't recommend it - if you want them inside the video, it's something else, cause you have other models Also, it depends if your traffic is coming mostly from desktop or mobile, because ad networks come in all shapes and models. I'm part of the Bitterstrawberry team and we help affiliates monetize their mobile traffic, so I can help you with all the information I have on the subject. If you want to monetize desktop traffic, it's something else. I hope this helps. People on the forum sure will
Do you have rights to show movies on your movie site? If not, then I doubt any legit ad service would do business with you... your best is DIY ads, find a good ad script, and serve up your own ads, however, it may take time to find advertisers (depending on your traffic)