In Damus, is .m3u8 necessary is the URL? And does it require a particular mimetype?

I ask because my video player is playing HLS nicely from a Blossom server, and therefore the URLs don't have file extensions and I've made no effort to change the mime type from application/www-form-urlencoded

So I'm hoping that Damus (and any other client) is as smart as VLC, i.e. it detects HLS by the contents

[To recap the context: I've adjusted the Blossom server to require a micropayment for each HLS segment, where the payments are over a Cashu Spilman channel]