: In many automated conversion scripts or commands, "60" refers to a specific parameter, such as a GOP (Group of Pictures) size or a segment duration. For example, in FFmpeg, a setting like -g 60 ensures a keyframe occurs every 60 frames to keep stream segments consistent.
: This is typically an index file used for streaming. It doesn't contain actual video data but rather a list of links to small video segments (usually .ts or .m4s files).
If you are looking to work with or create these files, these are the standard "power tools":
Most modern video platforms (like YouTube, Twitch, or news sites) use to deliver video. This allows them to adjust quality on the fly based on your internet speed. When you want to save these videos offline, you cannot simply "save as" because the video is broken into hundreds of pieces.