You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Spectre_(2015_film)

Context:
To promote the film, production continued the trend established during Skyfall's production of releasing still images of clapperboards and video blogs on Eon's official social media accounts.

Question:
For what film did Eon first use this method of promotion?

Skyfall