I'm late to the party (I've been in Belize SCUBA diving, and the sandy beaches seem to interfere with my WiFi connections...) but I do have a couple comments.
First off... kudos for being willing to put yourself on the spot and on your attitude towards the suggestions that have been offered.
I recommend people start with bag gloves and then, as their conditioning improves, step down to wraps and eventually bare hands. Not everybody will condition to that extent. Gloves interfere with developing proper punching technique, but the protection for the hand and support of the wrist makes them useful when bag training is first begun.
Others have commented on your elbows, so I'll just say I agree with them.

Your kicks...
In the first video, you're throwing a spinning hook kick. Sort of. But not really. I don't know what your training and experience is, but this particular kick needs a LOT of work.
Foot position: Your foot needs to be pulled towards your head, as in the picture posted (I think by Bill?). Impact should be with the back of the heel. You're impacting on the flat of the foot. Your foot should be parallel to the ground, not pointing upwards. You're halfway between a hook and a crescent kick.
Leg position: Your leg should be straight at the point of impact. Bending the knee prior to impact makes it difficult (or impossible) to strike with the back of the heel, shortens your reach, and steals power (leverage... a longer lever means more power...).
Turn your body and hip through the target.
I wish the video showed your feet, but from what I can see it looks like you're basically swinging your leg, mostly straight, from the floor to the target. This is an option, but I don't think it's ideal because it's slow and telegraphed. Try tucking the leg as you spin and basically throw a side kick 18-24" beside your target, then let your spin carry your foot into your target. That's not a great description, but it's hard to communicate a technique like this in a purely verbal manner.
For your roundhouses... bend the knee. You're swinging the leg straight, which, again, is slow and telegraphs the kick. And it would be, again, useful to see your feet. It looks (in the limited view we have) as if you're not pivoting your supporting foot. This limits your height, decreases your power, and can damage the knee on the supporting leg. The toes on the supporting leg should be pointing away from the target.