This video on removing urine from concrete has some flaws that need to be corrected. There seems to be a lot of different chemicals being applied to the concrete slab in this video. At Chem-Dry of Tampa FL, we clean and treat urine damaged surfaces like concrete to eliminate the urine odor in homes.
This video recommends TSP, trisodium phosphate, to clean the concrete. TSP is can be toxic if mixed incorrectly and it's not good for the environment due to its high concentration of phosphates. I recommend Outdoor Clorox instead, it's as effective as TSP without the negative drawbacks.
The next in removing urine from concrete is to use an enzyme cleaner to neutralize the urine that remains after the cleaning. The host in the video is using Nature's Miracle as her enzyme-based cleaner, which has a very powerful floral odor. It's not my favorite enzyme cleaner but it should do the job. It's not mentioned in the video but the enzyme cleaner has to saturate the concrete so that stays wet for at least 24 hours. you can ensure it stays wet by covering the treated concrete with plastic.
The next two steps in the video are to bleach the concrete and then to odor seal it with an odor control paint I'm not sure why you would need to bleach and odor seal the concrete if the first two steps were done effectively. Bleaching will do nothing for the odor and if you use Outdoor Clorox in the first step as the concrete cleaner it negates having to bleach again.
We do this type of work in Tampa FL all the time. You can always have a professional do it for you.