Mike Johnson is an Assistant Librarian at Bloomquest College in New Jersey. He created an easy to understand demonstration video on using ProQuest to find a specific topic in a specific journal article.
Mike is using a free online program called ScreenToaster. One of the features of that service is that it makes it easier to add subtitles and captions to videos.
Anyway, this is a really clear, quick instruction on how to get the most of ProQuest.