How to discover a WHEP URL

Hello HTTP experts,

The WISH working group is working on finalizing the WHEP draft https://datatracker.ietf.org/doc/draft-ietf-wish-whep/

During the Dublin meeting the group discussed the issue how clients can determine/identify how to handle a WHEP URL, but unfortunately without a good resolution.
The basic question is: if a user copies a URL into a media player, e.g. VLC, how can the media player figure out that this URL is a WHEP resource?

Proposals so far were:
 - a new URL scheme, which we all understand is probably not a good idea.
 - mandate that the URL needs to have a certain "file" ending like other existing media URLs; probably also not a great solution

We have an open issue for this question https://github.com/wish-wg/webrtc-http-egress-protocol/issues/15

Any ideas and/or feedback on this topic would be appreciated.

Best regards
  Nils Ohlmeier
  WISH WG co-chair