When it comes to defeating larger opponents it’s easy to figure out that not all martial arts are the same. Jiu Jitsu is one of those that gives you all advantage you can have against someone much bigger then you are.
If someone is untrained at takedown defense and staying on their feet it’s very likely they will end up on the ground. That’s exactly what happened in this fight.
Brazilian Jiu Jitsu is an excellent martial art to defeat bigger and larger opponents using technique and leverage and not brute force.