HLS redundant streams are an often forgotten part of HLS's functionality. The videojs framework supports backup or redundant HLS stream by default..
Some of users may not know about it, may not understand how it works or how to setup failover for his HLS stream.
When you're live streaming, everything has to go off perfectly, every time. Sometimes though there are several fundamental risks - BGP leaks, large-scale CDN outages, which present significant problems to even the largest streaming video platforms.