This Release is ReEncoded using next-generation video format/codec x265. it s one of the best and more advanced than current popular format x264. It also named HEVC which stands for High-Efficient Video Codec.
if you want to play this smoothly, you need to use a device/PC with at least dual-core processor.
You have to update your player to latest version. Also if you use your PC to watch it, installing LAV Filter will help you a lot if you want to use KMPlayer or PotPlayer. Many players have native support for the codec, live MPC-HC(free) or PowerDVD 14(paid).
Anyway, there s a video samples so you can download, check the quality and check if you can play it or not. it s very easy though. believe me, this format will be so popular in one or two years so you have to deal with it anyway.