It has often surprised me that western media associate Salif Keita with the Rail Band de Bamako. Salif Keita was a member of this orchestra for less than 3 years. With Les Ambassadeurs he sung for much longer. Maybe it is true as Graeme Counsel suggests that he left the band in 1982. I saw him perform with Les Ambassadeurs in (if I remember correctly) 1985. At the legendary African Feeling concert in Paradiso (Amsterdam) they left the audience gasping for more...
I am not sure about the name of the track in this video from Malian television. In Guinea the track is mostly called "Were Were", but in Mali bands tend to favour names like "Ah N'Dianamo".
Besides Salif Keita and Manfila Kanté (lead guitar) you may recognize the rhythm guitar player, Amadou Bagayoko (of Amadou & Mariam*, formerly known as "Le Couple Aveugle"). And I would like to draw your attention to the trumpet player, Tagus Traoré, who has not only played with Les Ambassadeurs, but also with Le Nimba Jazz and a range of other orchestras in Guinea, as well as playing with Ernesto Djédjé in Abidjan (and who now lives in the Netherlands).
* It seems a huge injustice that they have got their own wikipedia page and Les Ambassadeurs don't.