Another point: if the user is on macOS, which file archiver to use. 7-Zip has a version for macOS, but some people use The Unarchiver or Keka. Maybe a quick mention there. But since the query is in .avi.rar format, and the user might be on Windows, perhaps focus on the most common OS, which is Windows.
Wait, the file is named "Roughman Injection.avi.rar". So it's a single RAR containing an AVI. If the user just needs to extract it, the steps are straightforward. But maybe there are common issues users face. For example, incomplete downloads leading to corrupt RAR files. If the RAR is damaged, standard extraction might fail. How to check for that? Maybe recommend verifying the file or using the repair function in WinRAR. But that might be too advanced for a basic guide. Roughman Injection.avi.rar
I should also mention that sometimes RAR files can be password-protected. If the user has the password, they need to enter it during extraction. If not, it's a problem. But maybe that's a scenario worth covering briefly. Another point: if the user is on macOS,
Wait, the user just said "put together a useful guide". They didn't specify their OS or knowledge level. So maybe assume a Windows user with basic tech skills. But since the query is in
Are you sure you're 21+?