JW Player wishes to express our interest in attending the Workshop. Our subject-matter interests are streaming video and delivery of video advertising to web and mobile users. We noted a lack of video-related topics in the proposed sessions, so we would like to suggest the following for discussion: * Standards for server-side video ad stitching. In stitched ad use cases, the ad creative is muxed (appended) to the main video presentation at the server, creating a contiguous video stream that--among other benefits--minimizes playback complexity on the client, and defends against ad blockers. Today, these systems are highly proprietary and thus fragmented. Also, the lack of information on the client side in stitched ad scenarios presents challenges. For example, what counts as an impression? How can you reliably measure how much of the ad was watched? What is the mechanism, if any, for enabling users to skip an ad? * Adaptive video ad delivery. Increasingly, web and mobile video content is delivered using adaptive protocols such as HLS and DASH. Most video ads, however, continue to be delivered in progressive file formats such as MP4 or FLV. This often creates a user experience where the “main attraction” adapts well to the user’s device and varying bandwidth conditions, but the progressive video ads start slowly, rebuffer often, skip or stutter during playback, and subject the user to a generally poor experience. We would like to discuss how technologists, creative agencies, advertisers and other interested parties can develop standards (or implement existing standards such as DASH in a consistent manner) for delivering ad creatives using adaptive protocols in HTML