Soundcraft UI24R - connecting to the computer to stream videos and music to headphones

1st day of familiarizing with the unit, I followed YT guides on setting up a channel to output playback from the computer. I initially saw signal coming in the channel but had no music coming out of my headphones.
As a newbie, I didn't understand the patching section, which mine was messed up. I saw a video from steve sleeper regarding the patching and how he patched the aux to the headphones out and I figured to "reset to default" the Master HW outs.
Worked now. I want to study more/watch videos about the mixer while using it, also to check if any downtime/glitches occurs. Hope it helps!