There are a lot of sects within the Hindu religion. IIRC, it is the Jain sect that reveres all animals, to the point of allowing rats into the grain and wearing masks to prevent accidentally inhaling insects.
As to worshiping cows, according to my Hindu wife, they don’t “worship” cows, per se, they just revere them as givers of life through milk etc, and therefore don’t normally eat them. Further, this ceremony is taking place in Nepal, not India proper, so their beliefs are no doubt different from mainstream Hindus.
Thanks.