Usually this is caused by your ISP being a dick. They try to get websites to pay for the bandwidth (the websites already pay their own ISP, your ISP has no business charging them - that's like you trying to charge McDonalds for the gas money it cost you to drive there to buy a Big Mac). When the websites balk, your iSP throttles the data from that site. For sites like YouTube, it's a lot easier because YouTube uses geographic caches spread throughout the world and in many cases at the ISP themselves. This is what the whole net neutrality thing is trying to making illegal.
There are a couple things you can do to try to bypass it. The simplest that *might* work is to simply change your DNS. Login to your router and change the DNS settings from default (the ISP uses their own DNS) to 8.8.8.8 and 8.8.4.4 - those are Google's DNS servers. If there's an option for a third DNS server, use 208.67.222.222. That's OpenDNS. These might direct your YouTube requests to a different server than your ISP is sending them.
If that doesn't work, you can try explicitly blocking your local YouTube cache server. This one is a bit more involved, and if you want it to work for all devices you'll have to make the change on the router instead of your computer. Block 206.111.0.0/16 (that is, 206.111.x.x). If your router asks for an explicit range, start with 206.111.0.0, and end at 206.111.255.255.
In other parts of the country, it's 173.194.0.0/16. There may be others as well. No way to tell for sure which one your ISP is using without digging through the network traffic headers of the video stream. So unless you do that sort of stuff for fun on your lunch break, it's easier just to try blocking the two above IP address ranges.
https://www.reddit.com/r/technology/comments/13kmvd/have_time_warner_internet_but_can_barely_stream/
Blocking the peering cache server forces YouTube to download the video directly from Google. Bad for Google, but good for bypassing any silly throttling games your ISP is playing.
DownsyBrow :
I called them today. All they would do is reset my router. No one else is having issues that has the same ISP, that I know at least. Iv done all the anti throttling stuff that people have claimed to work but It has not done anything.
If you've already tried these, then it sounds like your router has QoS (traffic prioritization) enabled and is incorrectly tagging video as the lowest priority. Is someone on your network running a filesharing program? Those are notorious for sucking up all your bandwidth, and if they have a higher priority they will slow down any lower priority traffic.