What is Boomy McBoomFace?
The boom* is a cleanup prototype. From the OceanCleanup website:


  The Ocean Cleanup deployed a 100 meter-long barrier segment in the North Sea, 23 km off the coast of The Netherlands on the 22nd of June 2016.
  
  OBJECTIVE AND SET-UP
  
  To investigate the durability of our design, we deployed a system segment in the North Sea. At this test site, conditions are more severe than those in the Pacific Ocean, due to the North Sea's strong tidal currents, and the test site's short, steep wave patterns.
  
  The objective of the North Sea prototype was twofold;
  
  
  Test the boom design on a small-scale for survivability in extreme conditions
  Gaining experience as an organization in the ocean deployment of a cleanup array 
  
  
  FINDINGS
  
  During an inspection of the North Sea prototype in August, we noticed the two outermost air chambers were bent out of shape. Thanks to underwater footage we were quickly able pinpoint the cause; shackles had disconnected from the mooring, which increased the forces on the ones remaining as well as the floater. After our diagnosis, we continued to closely observe the situation and decided to take the barrier back to shore after close to two months.


The design has changed since (bottom of page).

These Youtube fragments have some more shots: 

Video 1
Video 2 (Dutch)
Video 3 

That last video goes into detail about it's design and later versions. The comments state that 


  the new North Sea tests are aimed at assessing two variations of floater-screen connections as well as the application of antifouling on the screen


* A long pole, often heavy, e.g. along the foot of a sail. In this case, sheets/screens are hanging down from it.