From the Windows Phone Store description:
Watch over 5,000 Free movies Online * update Daily. Watch it on your Windows Phone.
We daily scan the web to find the best free and full movies on the web.
Watch Sci-fi, Horror, Crime, War, Western, Romance, Comedy, Fantasy, History, Mystery, Drama, Thriller, Musicals... now!
Now you can sort by year, IMDB rating, Alphabet and new releases...
Soon: we will support more languages and subtitles.
DISCLAIMER: The content provided in this app is hosted by YouTube and is available in public domain. We do not upload any Movies to YouTube. This app is just an organized way to browse and view these YouTube Videos. For better performance use 3G or Wi-Fi.
* Streaming Full movies
* Sorting by IMDB Rating, New releases
* Movie Information including synopsis, actors
* New releases Updates
* Search bar
The idea here then is that the developers scour YouTube for movies (usually with subtitles and not the original mainstream English releases) that have been uploaded around the world and then index these for pick up by their application, Movie Planet. Surprisingly, the system works rather well, with the obvious huge caveat that if you're planning on watching something then you'd better do it sooner rather than later!
Here's Movie Planet in action:
The opening list is for the latest uploaded movies that are likely to be in demand (though see below for more), tapping through shows full movie info and cast, etc.
The movies really are hosted on YouTube, so are legal to watch, even if probably not always legal for the uploader to have put them up there in the first place...
In this case I'm happily watching Avatar. Though not in 3D of course....!!!
Many of the uploads have been done of subtitled foreign versions of the movies - making them slightly harder for the studios to keep track of?
Unsurprisingly, every now and then you'll come across a movie which has been withdrawn after a publisher complaint...
There's an IMDB-like attempt to catalogue movie info as it goes, though it's shallower than it looks, with no hyperlinking or cross referencing; (right) where Movie Planet possibly has longer legs is in indexing all the full length movie content that's slightly more legal on YouTube, such as documentaries...
In this case finding an excellent Joy Division music documentary... And yes, there are ads everywhere in the main UI, though not obviously within the main video content, which is served up by the big YT....
You can download Movie Planet here for free in the Windows Phone Store.