Haha!
Interesting!
Just had a look and it would seem as though someone has taken the TOTP2 version, dubbed it from the record itself and done digital zooms at the points where the annoying on-screen information text comes in.
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I'm not sure if this is an official video.
I'm also browsing through my files on my PC and found this recording noted as the Top pop recording for Dutch TV.
In those days Toppop was the dutch version of Top of the pops. It was common that Ad Visser (presentator of Toppop) did invite artists to come to the dutch studio to perform (mimed) their hit from the moment. See also the Killer Queen performance in Toppop earlier in 1974.
Maybe Roger was impressed by his appearance at toppop and made it his official video from it ??
I have uploaded this version I mention.
http://w8tw1z.1fichier.com/en/