Is a the most popular media container format on phones without the support of 3G, which is currently somewhat outdated.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 format for flash animation, graphics, audio and video. Its main purpose - to work on the Internet. Images in SWF format scaled to any size without loss of quality and video is small in size and loads quickly.