At the 2:47 mark, you'll notice Step 4 - it appears you skipped this step, and that's why you had bubbles with each application. With a heat gun, or a torch, the bubbles pop immediately. Also, with most epoxy / resins, you're supposed to sand between pours, so that the layers bond well.
A heat gun will take out the bubbles, level it out, and make it clear as glass on the first application. I’ve used this product a lot, just a tip for you.
Really good 3 part video, Frank. How much did all materials cost for this project? Also, apart from the butcher block, was all materials sourced from Home Depot/Lowes?