The cast of Sound Test for Blackmail - 1929 includes: Alfred Hitchcock as himself Anny Ondra as herself

Coquette - film - was created in 1929.

Blackmail - 1929 is rated/received certificates of:

Argentina:13

Australia:PG

Brazil:12

Canada:PG (Ontario)

Finland:K-12 (1995)

Finland:K-16 (1931)

Germany:12

Iceland:L

Spain:T

Sweden:15 (DVD rating)

UK:A (original rating)

UK:PG (video rating) (1989)

Either 46 or 47 films - one 10-minute short film was lost. Blackmail (1929) had two versions, one with sound and one silent. There were also 2 French propaganda films for World War 2 released with sound.

Depending on the context, blackmail is already a verb.

For example "to blackmail someone" is an action and therefore a verb.