A prudent street fighter rarely kicks. Real life is not like in the movies or on cartoon video games. Kicking while on uneven grounds can make one lose balance or can open up space for the opponent to take one down. Great fighters can rush into you while your foot lifts up and still coming down or you've missed on a horizontal kick and you can't pull your leg back soon enough to keep your balance for the next move. You can't change position or move for your defense at that very moment.
The way these guys fight, you can tell they aren't trained fighters. So, it's good they don't kick higher than the knees; they'd lose balance if they did that.
I'm surprised and impressed at these though:1. the White guy is able to take three blows to the jaw before going down (usually one hit will do it), and 2. the Asian guy is able to consistently throw three punches to the same spot--the jaw--very accurately.
It might be best for all of us to wear neck protections. You can tell street fighters always go for the necks. The White guy tried three times at the Asian guy's neck: one was blocked and the other missed (the fist flies right in front of the Asian guy's face). The Asian guy's fists have missed the White guy's jaw five times before he finally took his time to aim better.
When you are being cornered or attacked like they one has to defend themselves. I’m surprise I don’t see any kicking in these self defense.