There is no particular meaning 액션 영화의 시초이기도 하고... It is also the beginning of action movie and... From https://www.howtostudykorean.com/ We can apply the meaning of ~도 to verbs or adjectives that have been changed to their respective noun-forms using ~기. Let’s look at how we can do this. Look at the following sentences/clauses: 그녀가 예쁘다 = She is pretty 내가 밥을 먹는다 = I eat We can turn those clauses into nouns by attaching ~기 to the predicating adjective or verb: 그녀가 예쁘기 내가 밥을 먹기 By attaching ~도 to ~기, you are indicating that the clause also occurs in addition to some other clause. For example: 그녀가 예쁘기도… 내가 밥을 먹기도… Those constructions are not sentences yet – they’re technically just a clause in noun-form. In order to turn them into actual sentences, 하다 is typically used as a predicating verb. For example: 그녀가 예쁘기도 해요 = She is pretty too 내가 밥을 먹기도 했어 = I ate too Make sure that you are aware of the function and meaning of ~도 – and the meaning that it can create depending on the noun it is attached to. Remember that only the noun that ~도 is attached to is the noun that carries the meaning. Look at these examples: 그녀도 예뻐요 = She too is pretty (In the sense that other people are pretty, but she is too) 그녀가 예쁘기도 해요 = She is pretty too. (In the sense that she may also have other qualities or characteristics, but she is pretty too)