i got a little bit diff uv unwrap is this ok? or i just did any mistake.
The only piece that is very different is the circle UV island for you is totally straight. If you did exactly the same and got totally different results, maybe your Blender version is unwrapping things differently, so you could try using the same Blender version as in the video to see if you can get the same results. Not very necessary but you could experiment.
Jumping in with the same response, but what you have is completely fine! Like was mentioned, depending on where you made seams or the version of Blender you have, it will likely unwrap slightly different. The main thing you will want to take a look at is that you are getting minimal stretching in your UVs, indicated by the blue colour. With what you've shown, I do not think you will have issue continuing along with the course. :)
