Internet Connection abnormalities

In the past, this happened once, and it's come back for the past week.

Symptoms:
- Can't load 2 sites: imgur and xkcd (probably more, I just have come to notice these 2)
- Youtube is UNUSABLE. Other video streaming hosts (pron) work fine, just not Youtube.
Additionals:
- Bandwidth tests:

 local host

 LA host

- Proxies work, leading me to believe that my ISP switched to providing a different IP address, or group of similar ones, I'm not sure.
- I'm using a combination of dynamic IP and Google's DNS.
- I have access to the router's setting (192.168.1.1) to provide extra information if required.
-

 Spoiler

Thanks ahead for any tips to resolve, or bypass this problem.

Quick question. Err, or more of a request.

Try going to these websites:

http://173.231.140.219 (imgur, should bring up a 404)
http://72.26.203.99 (xkcd)

When you say YouTube is unusable, does that mean it loads but video streaming is piss-poor? Or it can't load at all?

The reason I'm asking is because I suspect something may be off with your DNS server.

Quick question. Err, or more of a request.

Try going to these websites:

http://173.231.140.219 (imgur, should bring up a 404)
http://72.26.203.99 (xkcd)

When you say YouTube is unusable, does that mean it loads but video streaming is piss-poor? Or it can't load at all?

The reason I'm asking is because I suspect something may be off with your DNS server.

Both do not work. And Youtube just loads very slowly, to the point of "pineapple this pomegranate".

I guess I can try using a different DNS, brb.

EDIT: Nope, both accessing the IPs directly and using dynamic DNS server do not help.

Oh and, the time it happened before, this problem prolonged for 2 days then went away without a trace before I decided to do anything about it.

Hmm, I don't think I can help then. It's probably something to do with your ISP? If you do a tracert on the command line to imgur.com you'll probably see your connection drop somewhere along the way.