These databases will be useful for topics that touch on many different disciplines - they provide information related to all humanities concepts (film, literature, women's studies, etc.) but come with the drawback of sometimes having too much information in too many different directions.
In addition to general databases, you will likely want to peruse some subject-specific databases, as well. These are narrower in scope, meaning you can use fewer keywords and get more specific information relevant to the discipline you're researching within.