The Streaming Video Alliance has two primary membership levels. The first level, Supporting, is designed for companies that want to listen and observe but can’t commit to contributing. This means they can attend meetings and working group sessions but can’t contribute to documents (such as reviewing or writing sections), can’t lead projects, can’t chair working groups, etc. The second level, Principal, is designed for companies seeking to actively participate in one or more working groups. They can lead projects, act as working group chairs, vote on publications, be voted to the board (two board seats are reserved for principal members), and contribute to documents.