The homelink should have came with the car to begin with. Wished I found your video earlier. I end up purchasing one of those rear view mirrors with auto dimming, compass, with the homelink. The homelink on the console is more ergonomically friendly. With the homelink on the rear view mirror you need to reach ahead and try to press the correct button. Not an easy task, especially at night. What year Accord did the homelink came from?
Can I ask where you our purchased your home link mirror from? Im going to test drive a CPO Honda that I dont think had this. Im sure dealer would be happy to install at a crazy cost.