Windows PC output to TF1 on USB Channel 33 and 34?

Hi,

My PC (windows base) is connected to TF1 via the USB Host (back of TF1). However, the sound can only be output to Channel 1 and 2 of the mixer.
There is a way for Apple to configure the output to Channel 33 and 34 (as seen in this video: How to Playback Music from Computer in Yamaha TF1 via USB connection - YouTube). Is there anywhere that I can configure the PC to output to Channel 33 and 34, so that I can use the stereo in of the mixer?

Regards.

seems that there is no way of changing the output.

Or the output from PC already inclusive of USB33 and USB34?