Need helps with combination. Any suggestions?

[Andre]

Nones answered you.

So I will for once.

Video number two is out of order so ??

The first one i think would work better if they were comming in at you and you threw that cross over their extended jab after beating them to it with your jab; which would have their extended jab disrupted and moving slightly away from your cross just in reaction to it being beaten to the draw:
That way the rotate reaches you into target and the slight pause because of it and the head movment for no reason on the over extention,are working for you not against you.

What ever the next video is, it will work in some situations better than in others anyway whatever it is,you just got to know which ones work where
and ustilize them all in your thoughts first, then your shadow boxing,then your sparring, so you got those varying bullets all ready to fire in real time when the right situation unfolds.

[mrodub]

You need to find what works for you no one can tell you.You have to be comforatable when you throwing try moving your head to the left when you throw practice in the mirror with whatever style you decide but to be honest you need to spar if you wanna be any use i spar 5 days a week its the best way to learn

[greynotsoold]

When you jab, you are stepping with your left foot and leaving your right foot behind. Push off your right foot and jab simultaneously with the movement of the left foot; in the video you are stepping, then jabbing. That "step" should be more of a glide and when the left foot settles, the jab should be fully extended. Its a fencing type step. Watch Ricardo Lopez.
Your right hand is slow and telegraphed because you leave your right foot behind, Thus it takes a long time to turn your body to throw the punch. Bring your right foot up right away- it shortens your base, gives you a faster right hand and leaves your feet in a position where it is possible to maintain balance and throw more punches.
Finally, that "head movement", leaning the head the the right as you jab is why you are getting hit with right hand counters. Your body should be twisting to the left as you throw your right; your chin, being on your chest should do the same. This will get you out of the way of the right hand counter.