Videos on websites doesn't work when connected to wifi

[Android Central Question]

I own Moto g4plus. I have this prom from last two weeks. When i want to watch videos from websites other then YouTube,they won't work. But the same videos work on cellular data.
The videos also works fine on my home WiFi but won't work on my hostel WiFi. I thought it can be problem with my phone but i am facing the same problem with my other phone. I tried to do like clear cookies and firewall and stuff,but no change. I rebooted the router and re-entered the WiFi password and stuff but still no change.
And these websites are working on my roommate's phone just fine.

Please anyone know what to do?

 

[B. Diddy]

Welcome to Android Central! Can you try changing the DNS server? http://www.howtogeek.com/167533/the-ultimate-guide-to-changing-your-dns-server/