Should we use `sabr:` instead of `sabr://` for SABR URL detection & construction?

[PikachuEXE]

Question

From https://stackoverflow.com/a/52065335 & https://www.rfc-editor.org/rfc/rfc3986#section-3.1

scheme: //authority /path

  URI         = scheme ":" hier-part [ "?" query ] [ "#" fragment ]

  hier-part   = "//" authority path-abempty
              / path-absolute
              / path-rootless
              / path-empty

Since there seems to be no authority part for SABR URLs, URL like sabr://audio?whatever would have hostname set to audio while I think the RFC expected sabr:audio?whatever without //

Other details

Got this while investigating FreeTubeApp/FreeTube#7919 (comment)
CMCD manager with SABR URLs (though with the right SABR URL it still causes infinite loop which is another issue

Checklist

• I am running the latest version.
• I checked the documentation and found no answer.
• I have searched the existing issues and made sure this is not a duplicate.
• I have provided sufficient information.