I have only watch the "big mac video", but i honestly feel that is quite enough. I find it is a super strange mix of ideology and "economics", designed to tell a specific story. Trying mathematically prove your morality like this is nonsense Several things jump out.

Using Encephalization quotient as a measure of life value seems very arbitrary.

The 0.5 factor also seems very arbitrary. Surely any accidental death is already included in the life expectancy. It is a good way to inflate your numbers though...

Calculating the "value of cruelty" is also pretty ridiculous. Especially by multiplying EQ and age. Surely other factors are more important (and super subjective)?

lots of stuff like this...

In the end you get some ridiculous number and reason that no one would ever pay that, as if that number actually means something. What is even the purpose of this number. Should i calculate it for a big mac and a chicken nugget and compare in order to decide what is more humane to eat? It is not informative in any way

By all means, be vegan. It has loads of benefits. There are many compelling economic arguments for veganism, but your "cruelty calculation" is not one of them.