Clear your browser's cache, cookies and histories. Or update browser to solve it.
Or you can try this method if it don't work:
http://www.videoconverterfactory.com/tips/fix-youtube-videos-lagging.html
Customer support service by UserEcho
Clear your browser's cache, cookies and histories. Or update browser to solve it.
Or you can try this method if it don't work:
http://www.videoconverterfactory.com/tips/fix-youtube-videos-lagging.html