Preparing for this years RGB LED display by testing my aging Twinkly lights

So I have an idea for this years setup. I want to create more of an wall this time so I can use the fancy animations, but I am not sure if my old revision 1 will still work. First attempts weren't promising. So we have to figure out whats going on, because I really want it to look impressive this year in all its RGB LED glory, but I haven't got the money to buy anything new. ... https://www.youtube.com/watch?v=QnEKZzJaKqo