Well for small foreign language groups/Congo's they already stream public talks from the stream.JW.org (where also special events are streamed) recorded in a country where the native speakers are.
It's not a big leap from there to having public talks in smaller/remote Congo's streamed. Using DC speakers to improve brainwas....eh.... quality.
And then do that for all Congo's.
And then just translated HQ recorded stuff.
All relatively small steps. Could be done.