Great reaction - what would you expect from someone who was the Commander of the Order of Arts and Letters!

The song is about heroin addiction. The (very strange) video depicts the internal battle between doing what you want to do and what is best for you.

I made a suggestion that you might like, seeing as you like Sparks. I have two, actually. Type the titles as they appear, including what's in the brackets. It'll help you find the videos easier. They're of good quality, and are superior to what comes up in the search results. I think you'll like these Australian gems. Jimmy And The Boys - They Won't Let My Girlfriend (Video + Song merge 2023 re-work) The Reels - Misused Abused (visual + audio merge 2023)

If you liked that video you might like Grace Jones “Slave to the Rhythm” original video where there are elements in it similarly done. Jean-Paul Goude (also from France) did this and it is from the same time period as the Philippe Decouflé videos. So I don’t know if it was a particularly French style at the time, or they were influencing or copying off of each other. 
Ian McShane has a spoken word part. However a warning, there’s nudity in this video including what I consider a gratuitous and controversial nude scene (albeit very brief). Despite this the video was nominated for an MTV award.