Why changing DNS won't bypass the internet censorship
Things that will let you access reddit:
- VPN - gives you a different IP when requesting information from reddit
- Tor - gives you a different IP when requesting information from reddit
A DNS change will only change where you are going to ask for information, not your identity.
Accessing reddit.com by entering it's IP in the browser does what would happen by default by typing reddit.com into the browser. It doesn't change who is asking for information.
In the event that a nameserver is down, and reddit.com does not resolve to an IP, entering the IP manually is the only way to access reddit.com