I recommend you watch people and various sources that try to make serious analyses of the martial arts and that study the history of martial arts and how they have changed with time, to know that there are a lot of things that intervene in a fight besides the "letality" of a style, things like for what is gonna be used, for example, if it's going to be just for physicall wellness and excercise, for sport competitions, for exhibition of forms, as a complement for gymnastics or fitness, for self defense, for policial or military training, for ritualistic or religious purposes etc. and how in a combat everything can happen due to a lot of factors like the body sizes, the weight, the age, the combat experience, the proficiency with the martial art and a lot more
if you understand spanish i recommend this guy and to look for the original videos his suscribers are sending him to analyze
in that videos we see how people are trying to make several kind of competitions and incorporate different rules to test their styles
and that neither the MMA nor the other martial arts are some kind of magic that automatically makes someone invincible
As for the bullshido videos they are funny and show the state some martial arts have fallen to in sometimes in some places
but tended to generalize to much, making it seem as if most martials arts besides MMA,BJJ,boxing and kickboxing were truly somekind of farce emerged from a McDojo as they called them.
