How can I import a .rar archive full of uassets to my project without breaking all the links?

I found a really cool video on a waterfall in Unreal and the author provided a rar file with his assets in it but when I copy the uassets into my project, all the links are broken. Is there a way to fix the links?

Thanks so much!

Here is the video:

And here is the .rar file.