Based on the information available on the Sur.ly page, describe the primary function of metavid.ucsc.edu and identify at least two distinct categories of content it likely contained, beyond general congressional proceedings. Additionally, infer one way its 'wiki-based community archive project' nature would have benefited researchers or the public.
Navigate to 'https://sur.ly/i/metavid.ucsc.edu' Identify the primary function of the website from the main heading. Extract specific keywords or topics mentioned on the page that indicate distinct content categories. Synthesize information about the 'wiki-based community archive project' to infer a benefit for researchers or the public.
State that the primary function was an 'Open Video Archive of the US Congress' or similar. Identify at least two distinct content categories from the keywords (e.g., Healthcare, Energy, Economic Stimulus Plan, Earth Day). Describe a benefit of its wiki-based nature, such as enabling user annotations, collaborative indexing, or public contribution to contextualize video content.