Does You2box use my local internet connection for uploading?
No. You2box uploads your video files straight from Cloud Storage to YouTube without using your local connection. It tries to use the fastest, most direct available path between Dropbox or Google Drive and YouTube. Thus, none of your precious internet badwidth is consumed, once your video has been uploaded to your Cloud Storage account.
This makes You2box a valuable tool in situations where your internet connection is slow or unreliable. Cloud Storage solutions like Dropbox or Google Drive are very good at reliably uploading your files in the background using their respective desktop clients or mobile apps. You2box then moves your videos over to YouTube as fast as possible.