Many older browsers do not support HTML5, so you could have issues with the above code working properly on older client connections.
You may want to consider using player software, such as
JWPlayer, to achieve better cross-platform reliability. When combined with Wowza Streaming Engine, these players will detect incoming client capabilities and select the best video format for each client connection.
Please reference the following
article on how to configure JWPlayer for use with Wowza Streaming Engine.