I watched this video, and here are some suggestions:
1. In response to Liliana of the Veil's first discard, I would have used Brainstorm to find the best possible card to discard. However, Show and tell looked to be the right choice in that situation because you didn't have a Titan to Show and Tell in, although I might have discarded the Glacial Chasm instead if I'd seen it with Brainstorm.
2. I'm not a big fan of neglecting Glimmerpost. I think you should have kept it and used it game 1.
3. Always assume Wasteland, even if you don't see it game 1 unless you're playing against combo.
4. When you Crop Rotate your Karakas away game 2, that was a right move, but that was the wrong time. Crop Rotation is an instant. There are two times you activate it: 1. In response to your land being destroyed or 2. End of their turn.
5. Show and Tell is not for Legendary Eldrazi unless you are desperate, which honestly, you weren't. Digging to cast Kozilek would have reversed the Hymn's damage. Granted it worked, but it working in that case does not entail that it's a good move. I.E. if he'd had the Liliana before you swung with Kozilek, you'd gotten no benefit from Show and Tell.