I'm trying to build an youtube based app, and I'm using version 3.0 of Youtube Data API, I did register the app in Google Cloud Console and I did obtain an API Key. After that I tried to test it in a console application in Visual Studio 2010, I used a WebClient to retrieve a video search using this URL
"https://www.googleapis.com/youtube/v3/search?part=snippet&q=YouTube+Data+API&type=video&key={MY API KEY}"
I learned this from here. I used both a Browser key and a Server key, but the server sends back an error saying the request is incorrect.
So can anyone point me to the error I'm making?
PS: I am trying to make a windows phone app, and before doing so I wanted to learn how to manipulate the Youtube API first, this is why I am testing in a console application
Make sure that the YouTube Data API is enabled in the Google Developer Console. It should look something like this:
The key you are looking for is the server key, which looks something like this:
(I've truncated my key for security purposes). I now copy and paste this into my browser window:
https://www.googleapis.com/youtube/v3/search?part=snippet&q=YouTube+Data+API&type=video&key=YOURKEYWOULDGOHERE
This works for me. Start here to verify that the key is working and that the API has been enabled correctly. I suggest using the API client, because some API calls will require an OAuth 2.0 access token, not the simple API key (search API requires regular simple API key).
来源：https://stackoverflow.com/questions/21096602/using-youtube-v3-api-key