This is the second video from Balloon Cam prototype 2. This time I went for a walk with the prototype which I kept hold of with invisible thread. The reason for this is because it's very lightweight and wouldn't add as much weight to the balloons as normal thread or rope kept doing. The area that I tested this in was very sheltered and it took the prototype a little while before it started to float higher in a more open space.
It also managed to get stuck in a tree (twice) but surprisingly never burst or broke!!