This video appears as though a three year old child has just turned this radio on and is doing nothing more than pushing buttons, and looking at the lights...
What error message are you getting? In Chirp select the option for a baofeng uv-17 pro it works for the uv-21 pro v2. (don't use that to charge the startup logo though).
I have one of these I bought from eBay. I was really surprised. It’s an excellent radio. I’m going to order another one next week I’m really surprised I don’t like the antenna. I change the antenna but the radio is awesome plus you can push three buttons and on lock it and transmit on a lot of frequencies you can’t the best thing they came out with for $60.