No. If you look closely in the video, you can see that he switched from L2 to a program because the L2 Client starts lagging and you can see his mouse on the left top corner in L2 when he types something/does something in the program.
I'm using fraps and i know when you fraps L2 and switch to a other program or other l2 client, the first client (the one you're frapsing) starts lagging till you switch back to the first l2 client.
Check the vid closely and you'll notice it.