Vimeo

Video tracking for Youtube videos can easily be configured with build-in Google Tag Manager triggers. But other video players are not currently supported. Fortunatly most of the popular video players have JavaScript API which allows to create listeners and push data about video player events to dataLayer.

JWPlayer Tracking

JWPlayer has very detailed API reference here https://developer.jwplayer.com/jw-player/docs/developer-guide/api/javascript_api_introduction/