CHawk, thank you again for your reply.
I went ahead and swapped out the O2 sensor yesterday morning since I had it and I wanted to be sure that fuel pump was pulling the appropriate amount. I spliced in about 18" of clear pvc directly in front of my engine and drove it about 30 minutes over to my mechanic. The video I sent was about 10 minutes into during this first ride. It shows significant pocket of coming through clear hose about every 30 seconds to 1 minute. I talked to my mechanic some and got the service connector that was left at his shop and told him about the problem. I had already replaced the fuel water separator assembly beforehand. From there, I bypassed the fuel water separator, fuel flow meter, and pump up bulb individually all with the same results. I would have taken another video, but they all looked the same. After taking turns doing each of those, for the ride home, I plugged the fuel line straight into a portable 5 gallon tank I brought with me. After purging the air in the system within the first minute, it ran perfectly with no bubbles coming through. I should also note that with the normal setup, bubbles only came through when it was on a plane, around 3500-4000 rpm, and more when I ran it a little faster. At idle, no air ever came through. I ran out of time at the end of the day, but I think I eliminated everything in my aft box that holds the water separator and all. The next logical step is something at the fuel pickup, although that was replaced at the same time as the fuel line a few weeks ago. Overall, I'm encouraged that I'm narrowing down the potential problems, and at least I know it's a problem between the tank and engine, not the engine itself. I didn't think about it at the time, but I should have bypassed all of that stuff at once and gone straight to the engine, then I could really say it's got to be at the tank if I still saw air coming through. I'm open to suggestions of what it could be, but I'm going to keep plugging away next time I get a chance. Thanks ya'll!