The player crashes every time I watch a video.
There are a few causes to this problem. I will enumerate them below and then you can take advantage of the information to fix the problem:
The player might lack compatibility with your operating system. In this case, simply access the official website of the developer to download a new and compatible copy.
The codecs used by the player cause a crash and then the application closes automatically. I recommended removing any other codecs installed, then visit the application's page on Software Informer. The link will lead you to Combined Community Codec Pack. Install the codecs and then attempt to watch the movies again.
The movies are badly encoded causing crashes and memory leaks. You might need to rip them again from your Blu-ray discs.
There could be bugs in the way the application works. Even if everything is working fine on your computer, the program will always causes errors. A fresh installation or a new version could fix this.