I need some one's help?

please help me on how to use freecodecamp offline.

Free Code Camp itself only exists online. What you can do is run your own local instance of it on your own computer. This requires some setup and troubleshooting. It’s a process usually done by people who are helping to build FCC, not as a software service, but you can read through the setup guides for contributors on FCC’s GitHub page.

please give me if there is a video tutorial

There is not a video tutorial. The link I included above will take you to the documentation that exists.

ok, thank you. for your advice.

video tutorial on how to use feecodecamp offline
i get this video tutorial on youtube when i search.