Arena addon

[Littleburst]

Dont you think Ive allready done that?

That's indeed a possible reply. You could also be thankfull that he's trying to help out.

[JackBurton]

There is an addon called Tidyplates that can be setup to show enemy nameplates/castbars

http://www.youtube.com/user/plutonio.../3/XU7vizgszUs

[Nikita]

That's indeed a possible reply. You could also be thankfull that he's trying to help out.

Im very thankfull for ppl trying to help out. But Ive done all the obvious things here.

[Maxion]

From what I can see in the video you linked, the nameplates with classicon looks like either one of the modules for tidyplates (or the nameplateadvance one someone else linked might be an option if you can't find it for tidyplates).
And the group totemtimers seen in the video looks like they set up DBM (Deadly Boss Mods) to show them.