1. A method of identifying digital content related to a portion of a block of text, the method comprising: receiving, automatically or via input by a user, an indication of one or more words included in the block of text for which related digital content is to be identified; searching a database of digital content based on the one or more words for which the indication is received; retrieving from the database one or more digital content items or identifiers associated with the one or more digital content items, wherein the digital content items are related to the one or more words for which the indication is received; providing the retrieved digital content items or identifiers to the user; receiving a selection of one or more of the provided digital content items or identifiers from the user; and associating for display or replay the one or more selected digital content items or the one or more digital content items associated with the one or more selected identifiers with the one or more words in the block of text.