That's a solid start. You definitely have the idea of keeping the elbow in and not swinging the bell out in front, and that short-arm float drill is a good idea to learn to power the bell with your hip drive.
However, on your actual cleans it looks like you're still pulling with the arm a bit too much and too early. You seem overly focused on the elbow-strike motion. If you just think about getting the bell to float up and then getting your arm underneath it for the catch, the elbow action will take care of itself. On the float drill, see if you can get the bell to float higher just using your hip drive. Think about getting the bell to float right up to the catch point for the rack, so all you have to do is get your hand under the bell to catch it. Think "float and catch," not "pull."
To do this, be a little more patient in completing your hip drive. A cue I use all the time in my swings, cleans, and snatches is "Arm down!" as my hips are extending. You want to get the most power transfer possible from your hips, and when you start pulling with your arm before your hips are fully extended, you lose some of that hip power.
It's a natural tendency to pull up because the whole intention is to get the bell UP. But if you are more patient in keeping the arm down, you get more power from your hips and the bell will fly. Any time I have a rep that lacks power, I think "Arm down!" on the next rep and almost always find a new surge in power. There's a saying in Olympic weightlifting that "When the arm bends, the power ends." It's the same in KB ballistics.
Also consider trying some double cleans, if you have matched doubles (you can use mismatched doubles, but the asymmetry adds another complication to learning, and I personally just don't like the feel). A lot of people find that the double clean feels more natural and easier to learn than the single clean.
For the drop, I agree with the suggestions in
@Mark Limbaga's video. Especially with heavier doubles, I like to lean back slightly with a subtle knee bend to make space for the bells to drop straight down. I think about initiating the drop by pushing myself away from the bells, which prevents casting the bells forward.
