These strings are indicated by a mandatory parameter named boundary . The closing boundary is an EOL, followed by two hyphens, the boundary string, and two more hyphens. You use Text Content-type to send messages that are primarily textual. It is the default MIME Content-type . You also can specify a Charset parameter to indicate the text's character set.
Video is a generic term that can include any image or graphical data that changes with time.
This data can be black and white, gray-scale, or color. Also, it can be coordinated with sound. Video data requires the receiving user or application to have adequate capabilities for interpreting the video format and displaying the data. In addition to seven primary Content-type header fields and their respective subtypes, the MIME standard supports private or experimental types, subtypes, and parameters. These typically are enumerated by an x- prefix.