def query(vid, auth_key):
    '''
    returns the title, viewcount, time, and uploader of a Youtube video.
    vid is the Youtube video ID at the end of the Youtube URL.
    '''

    main = 'https://www.googleapis.com/youtube/v3/videos?id='
    key = '&key=' + auth_key
    ext = '&part=snippet,contentDetails,statistics'

    req = web.get(main + vid + key + ext)
    data = json.loads(req, encoding='utf-8')
    data = data['items'][0]

    title = data['snippet']['title']
    uploader = data['snippet']['channelTitle']
    try:
        viewcount = str(data['statistics']['viewCount'])
    except (KeyError, IndexError):
        viewcount = '0'
    duration = str(data['contentDetails']['duration'])
    # a video with no likes results in IndexErrors (assuming true for ratingCount, too)
    try:
        likes = str(data['statistics']['likeCount'])
    except (KeyError, IndexError):
        likes = '0'
    try:
        dislikes = str(data['statistics']['dislikeCount'])
    except (KeyError, IndexError):
        dislikes = '0'

    time = iso_8601(duration)

    return title, viewcount, time, uploader, likes, dislikes