Infotainment applications can provide new business opportunities when they're used in vehicular networks. However, these applications are challenging by nature, and a testing platform is required to validate that they work properly. Existing simulation platforms focus mainly on providing a testing framework for safety applications that don't require infrastructure. To address this, the Vehicular Emulations Platform for Real Applications (Vespa) was developed to allow for experiments with many vehicles running real-world applications with real-time requirements in complex network scenarios. To demonstrate Vespa's usefulness, a use case on the performance of video-streaming applications is offered. In this use case, the applications are tested in highway conditions in which packet losses occur due to network layer handoffs.