I watched the video too - this product is intended for mixing with your garden soil at planting time, when you are planting out in the ground. It's meant to improve soil structure, assist with drainage, yet retain moisture, and also contains a small amount of feed.
There's an implication in your question that that's not how you've been using it - have you been using it for potting and not in the ground?
This Kellog stuff isn't causing a problem in your garden - I think what it means when it says 'mix' with your own soil is, it's just telling you, at planting time, when you've dug your hole, to mix the kellog stuff into the backfill soil you've just removed, and which you're going to replace around the rootball when its in position. In other words, don't just surround the rootball with the kellog stuff, but a mix of that and your own soil. That's certainly what I do with any soil amendment at planting time if its not already been dug in all over - that might be my own garden compost from the heap, or peat, or a little of something I've bought at the garden centre, such as soil conditioning compost. Whether it's got 'poop' in it or not, I can't say, but it wouldn't be a problem even if it had, unless you're growing carrots. And yes, it will become part of your own soil - it'll break down over time, creating more humus in the soil, which is a good thing.
If it is mostly wood chips, then the nitrogen already included in the mix will help offset the nitrogen loss once its in the ground.