Is a the most popular media container format on phones without the support of 3G, which is currently somewhat outdated. Its main advantage is a compactness. Video data here gets stored in h.263 or MPEG-4 formats. AAAC-LC or AMR-NB are available for audio.
Is a cross-platform container format that is used for professional video and audio. It allows you to store completed projects and files with streaming, as well as data that has been compressed by any algorithm.