Channel failover

Per the docs…
Note: Be sure not to use a channel number that exists in another source’s lineup. Channels will merge them together and use the prioritized channel.

Just wondering if it’s a possibility to have a channel failover, rather than just a priority take first.

I have multiple sources between tve and hdhr for some channels and i’ve changed the input for hdhr to a custom channel to use the same channel-id as the tve stream. Would like to be able to have the hdhr failover to tve should signal degrade or be untunable.
By a similar token, there are some streams that are redundant either with tve or frndly etc, that are of a higher quality than hdhr, but would like to have it failover to hdhr should the stream be unavailable.

Is this a possibility?

anyone?