[YouTube-API] Validating Access Token is Returning Bad_Request Error

Examples requests:

https://www.googleapis.com/oauth2/v1/tokeninfo?access_token=1/fFBGRNJru1FQd44AzqT3Zg&alt=json

https://www.googleapis.com/oauth2/v1/tokeninfo?access_token=ya29.AHES6ZR5bqyYZSzbnDV7DEgbk597W9mgFG3scDhHmWGCLhHM65U6AKSa

Strange, as it was working perfectly fine yesterday. 

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