fixed video ordering

[Paulie-Aditya]

Changes

Simply flipped over the conditions and that fixed it

in the left column: episodes 1 and 3
in the right column: episodes 2 and 4

Context

@To1ne brought this issue up once, that the video ordering on : https://git-scm.com/videos is wrong.
Specifically, episodes 2 and 4 are in the left column and the episodes 1 and 3 are in the right column.

[To1ne]

@Paulie-Aditya Thank you for the fix. But would you mind cleaning up the commits (remove the merge commit) and rewrite the commit message to give it more context. There are plenty examples of good commit messages in this project, please follow by example.