A prominent portion of the traffic carried by In-ternet Service Providers (ISP) is delivered by Content Delivery Networks (CDNs). CDNs usually deploy their own caches at ISPs in addition to the servers deployed in their own premises. With the adoption of multipath transport protocols such as MPTCP, content consumers are able to retrieve their data from either caches deployed in their ISPs or server in the CDN premises using multiple paths in parallel. In this paper we present a study on the interplay between actors of a multipath-enabled video delivery system. For that we design a realistic numerical evaluation experiment; results obtained suggest that multipath can be both beneficial and harmful for ISP and CDN in different representative scenarios.