Sorry for late response. If that's still actual:
1. Content Type Name is the display name of a site content type. Try "Post" for your case or you can get a name from the SIte Settings -> Site Content Types for the list of available content types that you can use.
2. List Base Type Id. Yes, that's correct.
3. Scope Type. Yes, correct too.
4. Query. It is not mandatory. You can use the CAML query if necessary, but if you just want all the items/documents of certain Content Type Name then just leave it blank.
Let me know if you need any further help.