Hit 'Sync' button at the bottom right corner. Then press 'Add Music' to load your downloaded free music from YouTube, which will be labeled as 'New' and can be removed directly before you sync.First click 'Music Manager' to go into the music transfer center.You may need to click 'Trust' on your iPhone to authorize the PC and check 'Prevent iPods, iPhones and iPads from syncing automatically' in iTunes as the notice box pops up.Plug in your iPhone to computer via USB cable and then open WinX MediaTrans.Next we will give you an example of how to download YouTube music from PC to iPhone easily. Free get WinX MediaTrans first Free download WinX MediaTrans and get it installed with a few simple clicks. How to Transfer Free YouTube Music Download to iPhone
