Uhh... at 2:20, you've got to address that 'plumping'. That green patina is corrosion probably from flux that wasn't cleaned off when it was soldered and i looks like you've got pinhole leaks already. I'm not sure WTF that duct tape is doing there. Those foam insulation sleeves are pretty useless and it looks like they are on both hot and cold lines. I'm not sure what's going on with those bends. The vertical tube in the center looks like it was forced into he elbow going left into a 3 inch piece into the tee. None of that looks well fitted. I'd cut all that out and redo it as most of those solder joints look like they were not cleaned and fluxed properly. If you seal and foam that in, I guarantee your going to have leaks. Whoever did that 'work' needs to step back and learn how to properly solder copper tubing. I mean no offence if it was you, but if that was a purported plumber, well . . . Anyway, that mess is going to cause issues in the (near) future. I'd hate to see you go to all the trouble of sealing everything up only to end up with bigger problems