With the planned live broadcast on Monday, as mentioned we'll be using "Twitter Live Video" (well the audio part of it anyway); currently Twitter Live Video is "Powered by Periscope" (Twitter's original live video app.) as such if you'd like to live comment on the stream you may need to be registered in the Periscope app. since to keep commentary sane we'll be making it people we follow in Periscope only - so let me know your Periscope registered Twitter handle so I can follow you back.
At some point Twitter will likely close down Periscope and everything will be done just through Twitter, but at the moment it still seems to be a bit of a hybrid with regard to where features/functionality are. Again you don't need the Periscope app. to watch the feed, as of December 2016 that can now just be done directly on Twitter.
Live editions of The CBC will likely be "now and then" rather than a regular occurrence.