The Signbank lexicon service is a lexicon service plugin that makes a connection between ELAN and an instance of Signbank. Signbank is a webapplication for constructing sign language lexicons (the original Signbank: http://www.auslan.org.au/, several spin offs: https://github.com/Signbank). When ELAN is connected to a Signbank instance that is equipped with this functionality, ELAN is able to show videos of Signbank entries.