Skipped the whole video and just used the solver tool on this site https://pixel-flow.app. Those very hard levels with the frozen pigs usually take hours of restarting to figure out the right order. Found the answer instantly here instead of guessing. Pixel Flow makes you grind way too much on later stages but the screenshot matcher got me through Level 645 in two minutes. Dont waste your coins on power ups when you can just cheat the layout.