I want to crawl IMDB and download the trailers of movies (either from YouTube or IMDB) that fit some criteria (e.g.: released this year, with a rating above 2). 
I want to do this in Python - I saw that there were packages for crawling IMDB and downloading YouTube videos. The thing is, my current plan is to crawl IMDB and then search youtube for '$movie_name' + 'trailer' and hope that the top result is the trailer, and then download it.
Still, this seems a bit convoluted and I was wondering if there was perhaps an easier way. 
Any help would be appreciated.
There is no easier way. I doubt IMDB allows people to scrap their website freely so your IP is probably gonna get blacklisted and to counter that you'll need proxies. Good luck and scrape respectfully.
EDIT: Please take a look at @pds's answer below. My answer is no longer valid.
Crawling IMDB for movie trailers?