ilanyu/m3u8-downloader

m3u8-downloader is a command-line tool that lets you download streaming videos from the web and save them as a single file on your computer. Many websites that stream video don't serve one big movie file. Instead, they break the video into dozens or hundreds of tiny segments and send them to your player one after another. This tool grabs all those pieces for you, stitches them together, and hands you a complete video file you can watch offline, keep, or share. To use it, you just need the web address of the video's playlist file (that's the "m3u8" part). You pass that address to the tool, and it reads the playlist to find every segment, then downloads them all at the same time using multiple connections to speed things up. If any segment fails to download, the tool automatically retries. Some streams are encrypted, and the tool can handle decrypting those as well. Once everything is downloaded, it merges the segments into one file. You can optionally set a custom filename, choose where to save it, adjust how many parallel downloads run at once, and pass along cookies if the site requires you to be logged in. This is useful for anyone who wants to save a streamed video for offline viewing, whether that's a lecture, a livestream archive, or other video content hosted on streaming platforms. If you've ever watched a video in your browser and wished you could keep a copy, this tool does exactly that. You do need to be comfortable running a command in a terminal, but pre-built versions are available for Windows, Linux, and Mac so you don't need to compile anything yourself. One thing worth noting: the tool offers two methods for resolving where the video segments live on the server. If downloads fail using the default setting, switching to the alternate method usually fixes it. The README also notes that some sites may limit how frequently you can request segments, so dialing back the number of parallel downloads can help in those cases.