I don’t recommend tiling per this video. The installer is not achieving 95% coverage behind the tile and the grout joints will be completely unsupported. My pool tile was installed similar to this video and I have lots of grout problems and water behind my tile. This technique leaves lots of voids behind the tile and places for water to flow and ruin your pool. My pool needs to be refinished earlier than it otherwise would need because of this technique. The finished product looks great initially, but it won’t last.