You can look at it here for the direct link and more info:
Buster B. Jones - Thom Bresh and Tommy Emmanuel - Chitarrandia Festival Italy Backstage 2000 Busto Arsizio
Tommy Emmanuel is not with them playing in this video so we only get to see Thom and Buster do the Cannonball Rag. Well actually on the album that Thom Bresh and Buster B. Jones put together called Guts & Steel Groovemasters Vol. 5 from 2001 the song is called Cannon Ball Romp.
This video is from 2000 and if you didn't watch the earlier video. This event was called the Chitarrandia Festival. The duo Davide Facchini & Anita Camarella organized this Guitar Festival. And it took place in Busto Arsizio, Italy. Davide and Anita opened for Buster B. Jones, Thom Bresh and Tommy Emmanuel at the Festival. And on the afternoons at the hotel they filmed the guys playing around.
So I would not really call it "backstage" when they sit in the hotel restaurant playing their guitars. But hey, looks like they had fun.