Soundflower, takes seconds to configure. I made a post about it in the Do Something Resource thread-
This is going to be the thread to submit any backing tracks, drum tracks, drum MIDI's, drum WAV's, etc I'm also putting some links to resources to rip audio from YouTube. If you make a mixtape for the cashier at 7-11 with tracks you ripped off YouTube and get busted, you didn't learn it from me...
thegearforum.com
Routing Audio Into DAW: I strongly prefer this, because it's a clean rip and goes right into your DAW. I'm on a Mac and use Soundflower, it's free and really simple to use. Technically, you don't even use IT, just select it from drop down menus.
Soundflower -
https://en.softonic.com/s/soundflower:mac
Once you have it installed, all you have to do is open System Preferences>Sound>Output>Soundflower
Then open Logic, go to Preferences > Audio > Input Device = Soundflower
Open a stereo track, keep the Input Monitoring ON so you can hear what you're recording, press Record (might wanna shut the metronome off) then press Play on YouTube. Once it's over you can edit the clip and don't forget to switch your audio inputs back!
That's it!