I can't watch it,Below the link to the replay of the documentary aired yesterday. Not sure if it’ll work for everybody (and it’s in French without subtitles).
The legionnaires one can see are a Polish ACH with 24 years of service in the Legion, a SCH from Morocco, who we see receiving French citizenship at some point in the documentary, a Brit sergeant from Newcastle, who we see leaving the Legion at the end of his contract, and three more from Madagascar, Guinea and Ukraine.
Le Petit Caporal may know some of them.
Portrait de legionnaires
Pour des raisons de droits concédés à France Télévisions, cette vidéo n'est pas disponible depuis votre position géographique (TH)
I'll just have to follow Le Petit Caporal's views.