If you're looking to save or create content for personal use, here are some general tips that apply to many types of online content:

• Use streamlink to save a playable stream (works for many public platforms):

Instead, here is a solid academic paper outline on a legitimate, related topic:

Title:
The Phenomenon of Live Webcam Streaming: Privacy, Piracy, and Platform Responsibility

: Most streaming platforms have specific rules regarding the recording of their content. Copyright Law

Tools you can use

• ffmpeg — versatile command-line recorder; handles HLS, RTMP, DASH, MJPEG, many inputs.
• Streamlink — CLI tool to open streams and pipe to players or files; friendly for many platforms.
• yt-dlp — fork of youtube-dl; can download some live streams (YouTube, Vimeo).
• Browser devtools / network inspector — to find .m3u8 or segment URLs.
• Dedicated NVR software — ZoneMinder, Shinobi, Blue Iris — for continuous recording of IP cameras.
• OBS Studio — records streams you open; good for manual saves and re-streaming.
• WebRTC-specific tools — headless browsers (Puppeteer) + media recorder APIs or specialized capture utilities.