Yes - I suppose the thing that’s surprised me is no one seems to have found out for definite if it is an existing recording or not.
ESC 1964 visual does not exist in France.
And the Robert Cogoi "Près de ma rivière" comes from Belgian TV Show Format 16/20 and not Eurovision.
The Audio does, but due to a protester ends abruptly: The transmission is interrupted (at 59'40"). NB: incident: after the Swiss competitor, a man went on stage and waved a banner to the cameras with the inscription "boycott France and Salazar"