Have you mastered these Rook Endgame Techniques?(Rook and Pawn vs Rook)

These are some of the key ideas in Rook Endgame Technique. 

1.Lucena Position - 1:00

2.Alternate Winning Idea - 6:13

3.Philidor Position - 8:29

4.Short Side Defense - 11:10

5.Short Side Defense (F Pawn) - 13:52

6.Frontal Defense - 15:30

7.Passive Defense - 17:43

8.Passive Defense(F Pawn) - 19:38

9.Checking From The Side Defense - 20:51

10.Rook Pawn (Lucena Position) - 24:45

11.Rook Pawn (White Wins) - 26:35

12.Rook Pawn(Black Draws) - 30:34

13.Rook Pawn(Skewer) - 32:48

14.Vancura Position - 35:18

15.Knight Pawn Exception(White Wins) - 38:36

16.Knight Pawn Exception(Black Draws) - 41:02

Have you mastered these Rook and Pawn vs Rook Endgame ideas?
You can learn more about them here.

I have attached the time stamp with the names of specific positions and ideas. You can use them as a reference guide.

do mastering them get you a job or are you afraid of losing a chess game against low rated player

@woollensock I also would not claim that I have mastered them. I was just directing you to a youtube video which would go a long way in helping you master them. Click here.
Take a crack at it.

@111deuri Rook endings are probably the most common among chess endings. The statistical probability of going into a Rook ending is extremely high. I wish to improve my chess and help others improve too. This is why I wrote the post bro.

Watched the video, definitely can add these positions into my gaming style!