I'm attaching a video link, but listen - you might have to turn the sound up. Trust me, when you're in the Jeep it's a LOT louder than it sounds on the video. It sounds like it's coming from the left front.
Is this the brakes or a ball joint, or something else? Doesn't do it all the time - seems to be intermittent. Usually within the first 5-7 minutes of driving.
Also, I know I have a bad right side front caliper, as I pull to the left a little braking above 40 mph. Sometimes, when going slow, when I depress the brake, I get the same sounding squeek for 3/4 of a second. Gut tells me it's the brakes, just thought I'd see what the JF braintrust thinks too.