I know that Switzerland was weak in WW2 and that they relied on old WW1 technology and equipment to outfit the Switzerland Army. There's simply no possibility of Switzerland being added to CoH2 whether as a new Army or as a commander; they're in the same boat as Sudan, Italy and Mexico was during WW2- they had absolutely nothing worthwhile and their troops were horrible.
Also, it doesn't really matter if Switzerland is on the map or not in that video. Switzerland literally was non existent in the war and thus can be considered part of Germany.
How do you know that. The Swiss Army had maybe outdated weaponry during WWII. But their fighting spirit would have been great. And the Swiss Army turned the Alps into a huge strong fortress. Germany would not have been able to invade Switzerland that easily. And actually the Swiss air force got into some dogfights with German fighters and they did quite well.