I'm not a complete expert on this but I think all the premium cable channels don't have to have this system in effect. This would include the cable news channels and such.
I think it's only the regional broadcast stations that have to implement this system and if there were some event going on to trigger this it would mean the premium cable channels get knocked off. It might also implicate that most other comms are out too, which is why the system was kicked off, so you'd likely not get any live streams going on unless it was somehow blessed to be by whoever is in command to do that.
As far as I know (international here too!), in the event of this happening, this would be broadcast on all channels.
I am sure you would see plenty of livestreams popping up on YouTube or dlive or any of those platforms.
I'm not a complete expert on this but I think all the premium cable channels don't have to have this system in effect. This would include the cable news channels and such.
I think it's only the regional broadcast stations that have to implement this system and if there were some event going on to trigger this it would mean the premium cable channels get knocked off. It might also implicate that most other comms are out too, which is why the system was kicked off, so you'd likely not get any live streams going on unless it was somehow blessed to be by whoever is in command to do that.