I have an IBM thinkpad with an Intel HD graphics card. It is a dualboot with Windows.
The video performance I am getting is very choppy. It does not matter if it is a Youtube video or from a file. It is choppy. The same files under windows are not. This is not an issue of flash. I have tried other formats as well, with the same results. I have also tried a number of different players. Using smplayer I have a feeling that it may be connected to the audio. Changing the settings for the output driver does change how choppy it is. It is more or less, but always choppy..