High-quality video transmission over wireless local area networks is one of the most challenging issues nowadays. The Data Distribution Service (DDS) is a promising middleware that can be used for video distribution over WLANs. DDS has a rapid implementation in high-performance and mission-critical networks. This paper evaluates the performance parameters such as throughput and jitter when video transmission is introduced in a 802.11g networks using DDS. Furthermore, it investigates the DDS QoSs that affects video streaming over WLANs which is important when deploying end-to-end video streaming services with quality of service guarantee.