They are both great guitarists and have played togehter many times. In 1994 they released an album together called Terra Firma. The album was later re-released in 2004 by Sony along with Tommy Emmanuels album Determination.
Both Terra Firma and Determination I would say have the same "sound", however the song AC/DC Medly: Riff Raff/Let There be Rock that Tommy and Phil did really stands out. There's definitely more rock in this song than the rest.
While the video is not a live performance of Phil and Tommy playing we do get to see a lot of pictures of both Tommy and Phil during their on stage performances. We also get to watch pictures of them on their Electric and Acoustic guitars both solo and together.