Usually whenever I goto YouTube to watch few videos, it always lag while watching the video even for a 1 minute video, I sometimes have to wait for 5 minutes for completely buffering of video, between that time I always replay the video until it has completely finished buffering and then again, replay the video from start when Buffering is complete. Now this is a way too painful and time consuming process and the fun and excitement for watching that video completely dies down. so I thought of checking if my ISP was blocking my download speed for watching videos.