AWS Elemental MediaTailor is a channel assembly and personalized ad insertion service for video providers to create linear OTT (internet delivered) channels using existing video content and monetize those channels, or other live streams and VOD content, with personalized advertising. With MediaTailor, virtual linear channels are created without the expense, complexity, and management of real-time live encoding, and live streams maintain a TV-like experience across multiscreen video applications. Advertisements are seamlessly stitched into the content and can be tailored to individual viewers, maximizing monetization opportunities for every ad break and mitigating ad blocking. The service works with any content delivery network to provide dependable, scalable channel assembly and ad personalization.