RM is a proprietary video container created by RealNetworks Inc. – the pioneers in streaming media over the internet market. This format supports DRM and was widely used to stream video and audio data online in the early 2000s with more than 80% of online streaming was in the RealMedia format. RM is supported by iPhone, Android, Windows and Mac. This container is often used by online radio stations. Nowadays it is still necessary to install Real Player plugin to be able to play RM files on such streaming websites.

MPEG was developed in 1993 as MPEG-1 and it was a very popular format for audio and video storage. Today it is the most compatible media format in the world. When the format first appeared, it was innovate and ahead of its time, provided relatively high quality files while reducing their size and made it easy to upload and download files by compressing them. These features allowed creating video CDs, digital TV and digital audio broadcasting. Due to its age, MPG is no longer covered by any patents, that is why both Mac and Windows applications along with many hardware support MPEG video and audio natively.