The default config has a bunch of such sources: https://github.com/stupside/castor/blob/main/config.yaml

sources: - proxies: - "https://vidsrc-embed.ru" templates: movie: "/embed/movie/{itemID}" episode: "/embed/tv/{itemID}/{season}-{episode}"

  - proxies:
      - "https://1embed.cc"
      - "https://www.vidking.net"
    templates:
      movie: "/embed/movie/{itemID}"
      episode: "/embed/tv/{itemID}/{season}/{episode}"

  - proxies:
      - "https://www.rivestream.app"
    templates:
      movie: "/embed/torrent?type=movie&id={itemID}"
      episode: "/embed/torrent?type=tv&id={itemID}&season={season}&episode={episode}"

  - proxies:
      - "https://www.rivestream.app"
    templates:
      movie: "/embed?type=movie&id={itemID}"
      episode: "/embed?type=tv&id={itemID}&season={season}&episode={episode}"

You already have access to pirated streams. This app plays them for you. Check the source addresses in config.yaml.