Always copy the direct file URL (usually a .mp4, .mkv, or .m3u8) before handing it to the manager. Many sites mask the real link behind a redirect that can break the manager.
Sometimes your ISP’s DNS (Domain Name System) is what is preventing the connection. Switching to a public DNS can solve this. 8.8.8.8 and 8.8.4.4 Cloudflare DNS: 1.1.1.1 ipagalcom filmyzilla fix