The outside crescent kick used at the 1:42 mark I like to set up as a stepping kick after a fake with backfist or jab. If you are kicking with the right leg it will be in front, taking a southpaw stance. Lead with the right backfist or jab, step up with the back foot while at the same time throwing the kick high towards your opponent's head.
It is risky but if set up right can be a good technique. You can also set up a lead leg hook kick by following basically the same mechanics. I prefer the hook simply because when using the heel to strike with I feel it is more powerful than the knife edge of the foot.
"The hero and the coward both feel the same thing, but the hero projects his fear onto his opponent while the coward runs. 'Fear'. It's the same thing, but it's what you do with it that matters". -Cus D'Amato