There are some most popular video formats
The AVI Format:
The AVI format is supported by all computers running Windows, and by all the most popular web browsers. Videos stored in the AVI format. it have the .avi extension.
The Windows Media Format:
Videos stored in the Windows Media format. it have .wmv extension.
The MPEG Format:
Videos stored in the MPEG format. it have .mpg or .mpeg extension.
The QuickTime Format:
Videos stored in the QuickTime format. It have .mov extension.
The RealVideo Format:
Videos stored in the RealVideo format. It have .rm or .ram extension.
The Shockwave (Flash) Format:
Videos stored in the Shockwave format. It have .swf extension.
The Flash Video Format:
Flash video files use .flv extension.