I suspect that it's just closing on VM as, if a channel is closing on all platforms, they like to make that clear. This closure will be described as 'Channel no longer available', which suggests to me that this closure only affects VM.
Maybe jj will see a closedown slate in the scans along the lines of 'This channel is no longer available, but don't worry, similar content can be found on....'. This is what they usually do.
The normal way of handling one off closures is to replace the existing video stream with a slate. In which case, it won't appear until the channel ends and will, most likely, be encrypted using the original video stream config.