The game has changed quite a bit since the current 'steam early access trailer' was released. Considering that's the first thing people see when visiting the website, it might make sense to update it to include the newly remastered levels, Italy, WCUSA, Utah, etc. You can really easily date how old the video is by the old GM police skin. Since then the game has had so many vehicles added, so many visual improvements, and so much love and care put into it. The trailer should be a selling point and should showcase all of the new content that the devs have crafted for us to enjoy, drawing more people in with an accurate picture of what the game is like now.
A lot of stuff needs to be updated to resemble the current game, this site, the steam page, GMBH website, etc.
They should do it in 0.20 or something, because the steam trailer looks ancient compared to what we have now, and the trailer is trying to convey you into buying the game. But the wiki is getting reworked first.
Doubt the wiki people are the same people who would do the trailers and media. IIRC Nadeox1 does all the trailers, and he would just have to make one.