I didn't watch the whole video, but a rubber mallet probably isn't going to do much. And I wouldn't pry on it against the rear iron either. IIRC, MAZDA uses a puller.
What has worked for me...working around the outside of the FW and WITH the FW NUT STARTED BY A FEW THREADS....
*A larger Dead-blow hammer. Available for less than $12 here...https://www.harborfreight.com/4-lb-n...mer-41800.html and handy for a lot of other things too.
*If the FW has never been off they can be extra stubborn. I've CAREFULLY used a large traditional hammer (short handled small sledge) and a block of wood/piece of 2x4. Again, obviously, be careful NOT to contact the FW and work your way around the friction surface not going full gorilla but being patient. Eventually they come off.