问题
I did go through Youtube v3 APIs but couldn't figure out how to achieve something which can be done using v2 APIs easily i.e. get all most-viewed channels in a region for e.g. Sweden here
https://gdata.youtube.com/feeds/api/channelstandardfeeds/SE/most_viewed?v=2
来源：https://stackoverflow.com/questions/35437243/how-to-retrieve-a-list-of-the-most-viewed-channels-by-region