引用自 Nomax55：

I am of the opinion it is quite possible to develop a game with a small budget these days.

I am also of the opinion it is Impossible to develop a game without a budget.

The budget for developing any game must be thousands of dollars even if you are a "hobbyist developer", Hobbies cost thousands of dollars these days. Golf, Fishing, Cycling etc.

So I don't think GTGD should be restricting the tutorial to only the "Free" network assets.

I have been researching the Unity Network assets and Forge Networking is looking like the best I've found. https://www.assetstore.unity3d.com/en/#!/content/38344

Every review I have read is 5 star and extolling the asset, they have a large number of professional youtube tutorials.

I know its not cheap but I also know "Nothing is Ever Truly Free"

Go back 5 years and you would have been remortgaging your house for such a networking solution.

GTGD can probably get a free version if he contacts them and explains he's making videos.
Heck he might even get a discount code for GTGD members

just my 2 coppers worth