Problems viewing videos on YouTube

Hello, this problem: go to the YouTube app on the ps3, then run any video, but it is often slow. Hate how horrible. When you only run a video, the speed is normal (3000-5000 kbps) and buffer health 30-32 S. It is written in the section to show or hide information about video. But somewhere after 1-2 minutes the speed drops to 500-200 kbps and buffer 0.00 S. health in General And this happens on every video. My normal rate is 50 Mbit/s does Not tell what can be done? Rebooted the router, digging into the network settings - nothing helped. Still dog slow. Yesterday watched all the videos fly and without any loading. Today nothing can see. Can the router not handle the load?