My favorite blanket trying real men's fighting...
Since you had the balls to upload and ask for critics, i will judge you like a KB pro, and not a MMA wrestler... so i will sound like an ass with lots of negatives, but i think they are important. Sorry.
-You have a long neck...as the others said:chin down.
-Off balance after kicking, specially when stepping back. Don't let the leg go back on it's own...control it...put it back where you want to put it, not just where it lands.
-Hands down while kicking.
-Faster kicks. Too lazy while throwing them.
-When you kick, don't take your leg back just when you make contact... drive some kicks "through" your target.
-Teeps need a lot of work, not good technique, no power.
-You're not rotating on the planted feet while kicking, not enough hip into it, not kicking with the edge of the shin but with the flat part.
-Lots of time (specially after a combo/kick) you walk away from the bag with both your hands protecting the chest not the face. Don't make this a habit on the bag, it's not over after you throw your last strike of the combo, the step back should be a proper technique you drill.
-While punching, too much forward heavy almost off balance, with you head in front of your front knee.
-You don't rotate your feet when punching, you just stay on your toes, inclined forward. Specially the right foot, even when you punch with the left. That makes you loose power and of balanced like mentioned before.
-It seems to me you don't visualize an opponent. It's lacking of killing intent... I don't mean just power, but i don't know how to explain it.
-Are you aware when you shift? is it done willingly or just a consequence of not getting your stance back properly?
-Some punches have a lazy/slow come back.
-A personal opinion: when you do techniques and combos on the bag, don't mixed with fast combos that are not fight realistic: Like those at 00m25s 00m30s first video. Leave the fast/conditioning work for other sessions/rounds.
-You probably do it in other sessions, but just in case: Long heavy bags like those, are great to practice combos that will set up take downs... since you can actually do the first movement of the take down on the bag.
I like your side steps and pivots, i like your speed when you enter the hitting range from farther out... TKD would be a great style for you...
And again, sorry if I sound like a ass with too much negativity... But the road to MT is long and full of terrors...