@JDAW6 , how long do you cube each day? In order to progress that fast you need to have at least cube 4-5 hours a day, probably even more. Pyra progression is fast (I went from Sub-15 to Sub-6 in a week using L4E, but I practiced a lot since it was summer (Last summer in fact) and I had a lot of free time.) Also, in the video, your scrambling is slow, which is what happens when you start practicing a new cube. But for averaging 8, you need to be scrambling faster. Also, when scrambling the first scramble, you do L' instead of L and you realized that so you did L2 to fix it. Just some things to point out.
Also, next time you record: Show the scrambles so we know. Also, like SpedCube pointed out, you used a timer made of cardboard as a way to stop a timer as if it were stackmat, so you wouldn't know what time you got. Here is how you should start the timer. Spacebar is how you usually start the timer on CStimer. So, after you inspected, put the cube down on the mat, then press spacebar, so the timer starts. Then pick up the cube and solve. After you solved, then drop the cube on the mat, and simultaneously stop the timer by pressing spacebar. Then, turn the camera to show the time, and the next scramble, and then place the camera back to where it was. You can also use the "draw scramble" feature in CStimer to make sure you are scrambling correctly.