IMPORTANT: it looks like you're using a browser other than Google Chrome. There are numerous known issues right now with other browsers, so for now, please use Google Chrome. The app is pretty much broken under Safari and Firefox for now, sorry!
If you use a Trakt account, you'll be able to save films from the game to Trakt. Trakt accounts are fast and free to create.
You can also login with Google, but you won't be able to save films.