You have learned some lessons well, and others not at all. I don't mean to be overly critical, but you have to work on your end pattern plans.
1. You cleared up most of the problem balls at the correct time, and in the beginning of the rack I can't really fault the way you went about things. Granted I might have done things differently, but it's a matter of taste really.
In your first rack you made a classic and fundamental mistake. When you have a ball close to the rail and you have to move the cueball down table, you never try to get low on it. Stay high, make sure to have an angle so you don't end up in the position of death: Straight in with both balls near the rail. Walk over there to find out where you want to get. You might be surprised at how high you can stay and still have a good shot with control. You got out of trouble this time, the next time...perhaps not.
2. You do seem to understand which balls connect with eachother, giving you more control over the cue ball and smaller movement, but some times when you have a long(ish) shot you seem to go a little crazy and hit it too hard and with the wrong english. I noticed this in your earlier videos as well. The shot on the one being the prime example. You last shot on the 7 was perfectly doable, had you not put inside english on it. I'd take my medicine here, hit it with straight draw and taken the longer shot, I might have even put a touch of outside on it to make sure what happened to you, could not possibly happen. The angle on the breakshot is alpha and omega. I'll take a long shot with an angle over any length of straight in. For a side breakshot, the further the break ball is away from the rack, the more angle you generally need on it. Play on tighter pockets for a while, and you'll know why.
3. Once the balls are all open, take a pause, walk around the table and make a plan for the end pattern. Remember that the end pattern is there to make the ending of the rack as close to idiot proof as possible, not just to look smart or knowledgable. The 7 and the 14 are both dreadful key balls to the 8. The 12 was your only good one. Had you not bumped the 14, the 7-14-8 could have been, not good, but defensible if you could set up well on the 7.
