If you wish to run your “watch movies online” type of website using wordpress you need this plugin. This plugin integrates with your own WP Theme.
You can create any types like Movies, TV Series, Animes, etc. using the built-in wordpress taxonomy functionality.
You can then automatically fetch their infos searching by name and create a post.
After that all you’ll have to do to enable your visitors to watch movies/tv series online is to add external watching links.