First published on TECHNET on Nov 17, 2017
This post is a contribution from Vitaly Lyamin, an engineer with the SharePoint Developer Support team
The Video REST API provides an ability to discover and interact with videos. We’ve seen a number of issues retrieving thumbnails where the “ThumbnailURL” endpoint returns an endpoint (e.g. /pVid/video.mp4.PNG?VideoPreview=1) that is not suitable for use with an AAD app access token and is only accessible via cookie-based authentication (passive or active). Fortunately, there are a few solutions for this.
The Video REST API “ThumbnailStream” endpoint can be used with and without the width (in pixels) parameter.