That video was shot and published when Working Title was still an indie developer. Since then plenty of things have happened, most significatly that Working Title are now a first party developer and they are working on updating the default aircraft and avionics, which have never had any Charts or Simbrief integrations.
I think everything that can be said has been said in this thread.
We’re now assuming the modding role of the default Garmins and CJ4 from Working Title when it comes to Charts and SimBrief integrations, and doing so has a very high priority.
Regards,
Stephen