Strangely enough, it only works on the mobile app.
I used Telenor 3G and it works flawlessly in the app and on my PC when I make a hotspot.
However, when my phone is connected to my PTCL Broadband I have to set the DNS to 8.8.8.8 and 8.8.4.4 for it to work in the app.
The same Broadband doesn't load YouTube on my laptop, despite having changed the DNS settings.