Is GData Youtube API's Search Videos method free(Quota free)?

Question

This is the link for retrieving list of videos related to a keyword:

We can successfully get an xml response even when we do not provide an API key. As such google says you to provide the developer key like this:

So what should I infer from this behavior? Is the list video method free of any Quota (ie Can I make unlimited calls from any IP at any rate?).

Solution

It is limited per IP basis, which is less than API quota. Best practice is to use developer key to have better quota limits.

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