Video part 2

 It is a nice job, but one recommendation  >>>  You could raise either the handle higher or make a seat, so you do not have to bend your back when you working on the barrow.  A Chain Breaker is a bit faster and a bit safer than a Grinder, Hammer, and Punch. Master Links are a good thing to have as well. Otherwise, excellent video. I have seen Wheelbarrows used for many things, but this is a first for me.  Just missing a chain cover or some kind which I assume you were talking about at the end... I think I would have made the handles a little longer so I don't have to bend over so much.
Maybe even add a seat to sit on Cool idea!