Silhouette animation  A variant of cutout animation in which the characters are backlit and only visible as silhouettes.
sˌɪlʊwˈɛt ˌænɪmˈeɪʃən ɐ vˈɛɹiənt ʌv kˈʌɾaʊt ˌænɪmˈeɪʃən ɪnwˌɪtʃ ðə kˈæɹɪktɚz ɑːɹ bˈæklɪt ænd ˈoʊnli vˈɪzᵻbəl æz sˌɪlʊwˈɛts.