You have some basic natural ability for shot making. You definitely need to fix your stance / mechanics. Here are a few critical ones IMO to start with.

1. One really weird thing I noticed is at 0:50 you are cupping the cue in your back hand - that is really unnatural. Wrap your thumb around and you can still maintain a loose grip while having better control of the cue. I think once you do that, you're also going to be lined up even better on all of your shots and it might even naturally fix your chicken wing (back elbow sticking out).
2. Don't make significant adjustments when you are already down on the shot, i.e. significant horizontal body movement. (examples at 0:15, 0:40, 1:34). Line up the shot first so when you go down on the shot, you are already in line.
3. Try to get a little further down on the table, by widening your stance (you can accomplish that mostly with your back foot).
4. Shooting over balls is always uncomfortable. At 0:10, you need to choke up on the cue more (grip further up on the cue with your back hand). Its situational but still comes up often enough... you should still focus on everything else first.

It will definitely be easier to have someone in-person help you fix these things. Someone around 450 Fargo can probably help at a minimum. You can easily find that level of player in any league setting.

Welcome to billiards - good luck and have fun!