Where did you get that build of Vegas Pro 14, because afiak the latest available build at Magix is build nr 270.

I am from future, haha. No I think it is like that because it's Steam Edition

I don't see that slow CPU in my 14 build 270.
It renders with 84 % use on my laptop from signature the same kind of file with the same settings and rendertemplate as yours.
 

It takes 6-8 hours to render a 10 minute video with these settings.

And the usage of the cpu is like 20/30% only:(

Are you using 10 bit/HDR video as your source? If not, turn of 32 bit floating point mode. That is why it is rendering so slow. You're making it crunch a bunch more numbers and not getting any real benefit from it if you are using an 8 bit source like most people are. Also, why the odd frame sizes? Why windows media? Magix AVC would produce better results that would be playable on a wider range of devices.

Thanks for a tip Ill check it out Frosty, I am using these funny settings because I was doing a beat reactor project for a friend and his files formats were like this.

And to add to that I use windows media because this output format makes it very fast to upload it to youtube.

Okay so the situation is better after switching project settings from 32bit video levels to 8bit. Now to render a 15minute video it takes 1h40minutes, not 6-8hours. But it still feels funny and not right. While I am rendering my Vegas uses only 6% of CPU and every 10 seconds it jumps to 25% CPU usage and goes down to 6% again

Now try that with Magix AVC. You should be able to set the bitrate to the same as what you were using with WMV so it takes the same amount of time to upload.

Okay, give me a minute.

I don't have such a format as Magix (AVC)

They still called it Main Concept AVC back in those days, use that one.

There is no such thing as pixel format in mp4 and avc formats, do I change number of slices from 4 to 8?