I mean, there aren't any ladder rankings yet. If they ever put those in and guilds are attached to them then definitely and I hope they do that. But as it is now, it's better to compile a friends list of good players that you work well with and run tournaments. There are some guilds that are strictly for tournaments but not very many.
SPvP isn't really at that high of a level of competition yet.
Also I suppose I should have pointed out since I know most people weren't actually going to watch the video: That they're mostly talking from a PvE standpoint not a PvP one.