Hi Joseph,
Welcome to Microsoft Community.
You can use Windows Movie Maker to first convert the 8mm analog video tapes to digital. After that use your preferred application to edit. Windows Movie Maker will also help you edit them after conversion.
Refer to these links for more details:
http://windows.microsoft.com/en-us/windows-vista/from-the-attic-to-your-pc-digitizing-8mm-film
Feel free to ask more queries on Windows.