KVS (Kernel Video Sharing) is the market-leading self-hosted tube script, powering sites that collectively see enormous daily traffic. The PHP-based platform covers the full operator toolkit: FFMPEG transcoding with H.265/AV1 support, AI-assisted metadata (a GPT plugin for translation and tagging), content-import pipelines (FTP, XML, RSS), built-in CDN hooks, ad-zone management, and detailed traffic analytics. Version 7.x adds an NSFW/SFW classifier and granular age-verification customization - both increasingly required for compliance.

License cost is steep and scales with traffic tier, so budget for it upfront. Community forums and official documentation are solid, but enterprise support costs extra.