Does a recirculating hot water pump really do the job?

Check out the amazing comments on this video. You will get an education from many opinions and many optional systems.
Update: After two years of using the pump, I am having an issue. After about the first 6 months the valve started making a clicking sound after the hot water was turned on anywhere in the house. Look for my recent video showing how I have taken care of the clicking problem:
https://www.youtube.com/watch?v=tfo7TmMxZUU

In this video, I will show some simple demonstrations of what these pumps can do for you.
Introduction: 0:00
Demonstration of waste: 0:53
Pump Explained 5:39
Suggested Pumps 7:25
Add Voice Control 8:25
Installation 10:30
Success Test 13:01

Suggested recirculating pumps based only on my experience and reviews. (I have no connection with either of these companies. Shop around the prices will fluctuate in a short time.
Grundfos
https://www.amazon.com/Grundfos-GRU-595916-595916/dp/B000JG81AQ/?_encoding=UTF8&pd_rd_w=vHOSx&content-id=amzn1.sym.5fe95cd4-8512-42fa-bf21-63d83b898785&pf_rd_p=5fe95cd4-8512-42fa-bf21-63d83b898785&pf_rd_r=ZD81NKW3V9CFRJNSFX5D&pd_rd_wg=j8xsO&pd_rd_r=6c2e43f0-0fbd-4cad-922d-23db682b89c3&ref_=pd_gw_ci_mcx_mr_hp_atf_m

Watts Premier
https://www.amazon.com/Watts-500800-Instant-Recirculating-Install/dp/B000E78XHG/?_encoding=UTF8&pd_rd_w=Ilg6A&content-id=amzn1.sym.bbb6bbd8-d236-47cb-b42f-734cb0cacc1f&pf_rd_p=bbb6bbd8-d236-47cb-b42f-734cb0cacc1f&pf_rd_r=YM2271AQ19ZWJSPYD4M0&pd_rd_wg=elZL9&pd_rd_r=5d603523-ea4a-44f7-9787-79bbd370bacc&ref_=pd_gw_ci_mcx_mi