Common Courtesy with End-game Raids/Dungeons

[Doo]

Did the people that did that content before me watch video?.

Probably. I'm sure most of them watched how other fcs do it like with "Worlds first". Unless you're a super hardcore gamer and in a good fc/ls, it will take you a lot longer to be at their level.

Why should I be forced to watch a video?.

To find ways to improve your game and get better. You'll have more fun when you're good at things I suppose instead of wiping over and over.