CloudFlared is the application you run on your server, and CloudFlare tunnels are what it connects with. You get the same outcome as a ddns but it functions differently under the hood. You also need a domain name for this I think.
DuckDNS might be a good option to start out with.
Actually went to a theatre to see it. I like my films to be open to interpretation, not barely intelligible. Didn’t have a lot to talk about on the way home from that screening.