My initial observation watching the video is that although you make a tiny trigger movement with your front foot at around the time the ball is released, you actually hardly move your front foot at all with anything on the leg stump to legside and tend to stay in exactly the same place. If it's short you can step across with the back foot, and whne the ball is on the right line, you flick it pretty well, but when it is pitched on a reasonable length, you find yourself with your pad in the way.
When the ball is pitched well outside the off stump, your eyes light up, you step right across and then try too hard to hoof it, missing in most cases.
Your bat comes down in an arc from about 3rd slip to balls pitched on all lines, including from off so you are limiting the amount of time in which you are in line with the ball quite dramatically with that. It also means you play around your pad, as mentioned earlier, on the leg side.
I'd pass over to the coaches to help, but on a lot of what we can see in the video, you stay back and try and play late. The balls don't seem to be moving that much so you might want to consider coming forward more to the well pitched balls. You might find that you drive them better than glancing them as, when coming forward you are more likely to be in line.