title: How can I calculate my YouTube API usage?
body: <p>I'm building a pretty large app for a client that is going to aggregate feeds from various sources. My client estimates around 900 follow-able users will be in this system to start out, with more being added over time. He wants to update the feed data every 15 minutes, so we would need to update one user feed per second, assuming 900 feeds and a 15 minute TTL. As the requests take a few seconds to complete, we would then need to load balance across a few threads to tackle the queue asynchronously.</p>
  <p>Should I be worried about quota errors or hitting any kind of limitations? If so, what are our options?</p>
  <p>I've already read their help pages and documentation, but it's very vague; I need concrete numbers. It's not feasible to load test their API to figure out the limitation.</p>