Most of that video should still be applicable. In addition,check out the CODESYS Sample Projects found in the Learning Material area of the WAGO Download Center. Those samples include WagoAppStepper, which is the fb library you will want to use to work with the module, as discussed in the video.
Most of the specific module details, including operating principles, configuration options, wiring, diagnostic signals, etc., are all covered in the 750-670 hardware manual.
I suggest starting there. Another very good reference is this forum post: How to configure and program a 750-671 Stepper Controller
Your wiring for the 750-670 will be slightly different, but almost everything else is the exact same.
We may be able to help here with specific problems or questions you encounter, but you may be better off contacting your local WAGO office, sales manager, or application engineer for a thorough walkthrough of the module via a meeting if that is what you need.