Flickering on playback?

Hi,

I’ve put a piece of video footage into Adobe Premiere Elements 11 and on playback there’s very occasional flickering of a grey colouring?

I have already used this piece in a different software and put it on youtube with no flickering. Why is it showing now? Will it show in the final piece?

Thanks
Will

via Video Editing Forums: Digital Director – Adobe Premiere, Premiere Elements, and After Effects http://www.videoforums.co.uk/adobe-premiere-premiere-elements-after-effects/44110-flickering-playback.html