Although it is unfortunate that he passed away, these forums are no place for such discussion, and linking your video made this thread violate rule #04.

Outpost doesn't have any game servers.

Sounds like a steam-related issue, i'd recommend seeking advice on the following sub-forums --

https://steamhost.cn/steamcommunity_com/discussions/forum/0/
https://steamhost.cn/steamcommunity_com/discussions/forum/1/

Send trades? can you be more specific? are you referring to Outpost or Steam?

It's quite common, most traders are able to identify the universal trading code.

New update.

This sub-forum generally revolves around trading, you won't have a lot of luck getting server advice.

I recommend forwarding the thread to one of these sub-forums,
https://steamhost.cn/steamcommunity_com/app/440/discussions/
https://steamhost.cn/steamcommunity_com/discussions/forum/0/
https://steamhost.cn/steamcommunity_com/discussions/forum/1/
https://steamhost.cn/steamcommunity_com/discussions/forum/7/

You'll have to swap to DirectX 9.

- Remove "mat_dxlevel" from your config files.
- Add "-dxlevel 95" to your launch options.

This issue isn't even remotely related to trading.

I recommend you forward the thread to one of these sub forums.
https://steamhost.cn/steamcommunity_com/app/440/discussions/
https://steamhost.cn/steamcommunity_com/discussions/forum/1/
https://steamhost.cn/steamcommunity_com/discussions/forum/12/

+1 -- I personally think this should have been essential when working on the csgo port of Outpost, should be easy and simple to implement, best of luck.