I don't believe the video is real.
RED ARROWS: In the opening seconds of the video you get a flash of the headstone and notice the date, it's 2626. In case you didn't catch it:
2626. Later the date can be seen again (about 2:30) and the date is in a different format using just 2-digit year. Yet the date of birth is a 4 digit year. The 2626, the use of only a two digit year, and the birth/death date formats are not the same.
BLUE ARROW: In the opening seconds there is the initial shot of the tombstone with flowers, notice no dog feces and no urn/vase at the base of the flowers. In the later shot there is clearly an urn/vase at the base of the flowers.
As a final note, he might want to check the diet of the dogs if they are real. I've owned shepards before and their feces will be more rounded and elongated (think tube shape, or even curlying tubes) when on a good diet and not like a scoop of chocholate chip ice cream.
WW
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