It's hard to tell because your hips are never in view and neither are your feet. Anyway, it looks like you're leaning into punches versus transferring weight properly, or otherwise you're arm punching. Transfer some weight, bend your knees and rotate your hips into your shots. Get your whole body behind it.
As for the kicks, it looks like you need to work a lot on the strength of your legs. You can't support them in the positions needed to kick so you're just lifting your legs into the air versus kicking through it. Slow it down and work on both flexibility and strength of the muscles involved in the kicks. Right now you're kicking with bad form and it looks to be because you don't have the physical ability to kick at that height with good form.