Yeah, that looks familiar. I only watched the first few points.
Notice how one player will wait to attack the ball and then come to net, and the opponent will lob. Notice how the players that are two up win the point.
Most of the net play in 4.0 that I see is "opportunistic." A player sets up a point such that she can get to net without hitting the dreaded approach volley. That means a lob over the net player (buying time to get to net) or a short slice (ensuring the opponent cannot easily put it at her feet).
These are perfectly good ways to play doubles. My own tactic is -- and I know you will be shocked to hear this -- topspin lob over net player, run in, volley or smash. Second favorite tactic is topspin angle into side curtain, run in and volley wounded duck between the opponents.