Hi Takahiro,
Sorry, I don't know any sites with free streaming of movies or TV shows
But I do know some websites with interesting radio-like programs:
www.npr.org is a news station BUT the
Arts and Culture,
Books and
Music sections have really interesting topics.
Also
BBC world service has lots of material aimed at English learners. Once I checked and they had music videos there, with explanations of key expressions. I can't find them today, though. Maybe if you check there weekly, they might have movie or TV show clips sometime.
Both of those links are listed in the
eslHQ links section.
Finally, one website I like to watch free shows at is
worldlinktv but all the topics are political. Actually, all the topics are scary-political. I don't know if you are interested in politics, especially terrible American politics, but it is free video.
If I find anything better for you, I'll post it later.