After leaving Genesis, Peter Gabriel embarked on a solo career, but lacked the creativity to come up with album titles, it seems, until 1986's "So". His first three solo albums were all self-titled.
Such quibbles aside, Gabriel used a pastiche of images and some young children to form the basis for 1980's "Games Without Frontiers". The whistling you hear is done by Gabriel and producers Steve Lillywhite and Hugh Padgham. Kate Bush is on backing vocals, and would team with Gabriel for "Don't Give Up" on "So".
I don't think this version of the video ever saw the light of day on either MTV or VH1 back in the day, but it does do more for the song, doesn't it?