The Stream Detector by rowrawer

This addon provides an easy way to keep track of M3U8/MPD/F4M/ISM playlists and VTT/SRT/TTML/TTML2/DFXP subtitles used by Apple HLS, Adobe HDS, MPEG-DASH, and Microsoft Smooth Streaming streams.

Copy URLs by clicking their filenames in the addon's popup menu (accessed by clicking on the toolbar icon). URLs can either be copied as they are or transformed into readymade youtube-dl (recommended), FFmpeg, Streamlink, hlsdl or N_m3u8DL-CLI commands, including the User-Agent, Cookie, and Referer headers. The chosen tool then downloads the stream into a single file until it is finished or stopped. Use the addon's options page to customize your experience.

Note that websites such as YouTube, Vimeo, Facebook, etc. are very likely to use proprietary technologies which are not supported by this addon. When it comes to such "mainstream" services, it's better to use the tools (e.g. youtube-dl) directly.