video streaming, Help.

Bought Macbook Air, 4 weeks ago, up to now been very pleased, apart from last 3 days, watching youtube, or watching live stream, very poor connection, really not worth watching.using wifi, and reception seems fine, have made sure tabs are closed, was hoping it was internet issues,but seems okay, does anyone have any ideas please.

Try disabling 'hardware acceleration' in flash player and then reset Safari.
This should improve frame rates in YT and live streaming.

SM