Funnel's YouTube connector now offers a brand new report type: Channel insights. The new Channel insights report contains metrics such as Channel subscribers, Channel videos and Channel views. The values in this report are snapshots of the current number each day and the data is being "recorded" by Funnel from the day you connect a data source with this report.
To read more about the data available from YouTube, have a look at the What data can I get from YouTube? knowledge base article.