Packy I agree with you but if i live in other country where the national language is totally changed then, I think these tricks only remained the last option as I have mentioned above means movies on letsmewatchthis.net or as you have mentioned above means DVDs to learn foreign language.
German is not an easy language to learn and I don't think you'll learn much from watching movies. Check this site out for five free German language classes. One of them is Duolingo and I know that's about the best free one.
5 Ways To Learn German For Free - LearnOutLive