Comment by dathery

It would be hard to do end-to-end TLS (where the server proxies the raw connection) because

(a) you can't share one TLS connection to the host between multiple clients; if you wanted multi-client support while preserving end-to-end TLS, the host would need to maintain a TLS connection with each client and waste bandwidth re-uploading the same image

(b) there is no client software requirement, so you would have to do the TLS decryption clientside in the browser (maybe via WASM) unless you're OK with having viewers download software