It's not bad. The first thing to fix is that penultimate step, the one that sets you up to plant in LR.
Your heel should be low, if it is not, you will end up jumping forwards as you do. You will also lose a lot of of potential energy as your plant will act more like a brake. Imagine that your LR plant was two inches below your penultimate step, as if there was a mild drop. You will not jump as high.
So keep that left heel really low while dropping the cog during that penultimate. Watch a bunch if videos and it'll come naturally.
Lastly instead of thinking LR LR, think in threes. Initial step with the L, then RLR. Thats what your legs looked to be doing anyway. There seems to be a universal preference to take three steps preceded by a light hop or first lead in step before planting for a vertical jump off of one or two