I found this clip from the show ("Change Partners" featuring a few nice acoustic guitars and harmonies) here, which gives a taste of the picture and sound quality: https://www.youtube.com/watch?v=xsZ2xkGFh3w. Obviously not a high-definition experience, but quite watchable especially since it is the only record of the event (other than the 4 tracks on the official release). Not sure where you can get the Echoes release that I bought although the same show appears to be circulating via other sources as well e.g. http://www.stellarproducts.info/product_p/875.htm (I cannot vouch for the quality of that product though).