[Hls-interest] Token Auth support

["Law, Will" <[e-mail]>]

A number of CDN & workflow operators are concerned that the current design of HLS Content Steering (even with the QUERY-PARAMS object just unveiled this morning) is incompatible with the wide variety of token auth implementations used in practice today in multi-CDN implementations. We had an ad-hoc meeting last week and the notes are publicly available<https://docs.google.com/document/d/1Umhr7ioyZ0Svjp93UDajYJRb88MKvTCabNsAQuHnXGA>. Rather than simply reporting the problem, we also attempted to propose a solution. This we term ‘Redundant Stream Steering” and it is documented here<https://docs.google.com/document/d/1f4_9hU_4DXPiKusF1QMUX3OY2DRbYnEWimGcj7T1-ZE/>. Discussion is ongoing. We wanted to surface this to Apple sooner rather than later, as we appreciate that the window for design changes in HLS Content Steering is growing smaller. As part of a larger concern, questions on the robustness of content steering across Server-Side Ad Insertion were also raised. The SVA are looking in to these issues under the guidance of Glenn and will report separately.

Will, on behalf of

David Brown - Amazon CloudFront
Peter Chave - Akamai
Phil Cluff - Mux
Andrew Crowe - Limelight Networks
Glenn Goldstein - Lumen
Trevor Hunsaker - Verizon Media
Jessica Obermark - Verizon Media
Rob Roskin - Lumen
Zac Shenker – Fastly
PJ Speelmans - Theoplayer
Nicolas Weil - AWS Elemental