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
Сервис поддержки клиентов работает на платформе 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