Protecting video content from theft involves understanding various attack vectors and implementing appropriate security measures. These include hotlinking/embedding, downloading, screen-recording software, and physical screen recording. To protect your videos, consider using signed URLs, referrer protection, user-agent filtering, encryption with ClearKey and HLSe, DRM solutions like FairPlay, Widevine, or PlayReady, and forensic watermarking. The choice of security measures depends on the content type, attacker motivation, and tradeoffs between development costs, maintenance, playback errors, and dollar expenses.