: Often a variation of "ROFL" (Rolling On the Floor Laughing), though in file naming conventions, it is sometimes used as a shorthand for specific internet subcultures or series.
: This is typically a content code or a serial identifier. In many online communities, these codes are used to organize a series of clips or "packs." Rotf Lol Cp009 {6} mp4
: Indicates "Laugh Out Loud," suggesting the content is intended to be humorous or a "fail" video. : Often a variation of "ROFL" (Rolling On