Tunnels go through Cloudflare infrastructure so are subject to bandwidth limits (100MB upload). Streaming Plex over a tunnel is against their ToS.
Pangolin is a good solution to this because you can optionally self-host it which means you aren't limited by Cloudflare's TOS / limits.
Pangolin is a good solution to this because you can optionally self-host it which means you aren't limited by Cloudflare's TOS / limits.