Watchlist is a feature that allows you to keep track of those titles you'll want to watch. It has no function allowing you to actually watch them. IMDb is Internet Move Database and is a database of film information and not a downloading or streaming site. While some titles have video content available, most is a link to Amazon or some other site where you rent or purchase the content. There are some you can view for free, though. Most titles have no content available for viewing.