Minecraft did not check gamemode

So a couple months ago i made a video called "Free mcje Click this right now! (@minecraft fix this)" (and i did not want the Click this right now to be bold) i split it to 2 parts (because i did not verify my phone num.) well, the video just i have mcpe world convert it to mcje world with a website then i got the gamemode creative, i can switch between worlds, maybe, just maybe, made it so it always make the gamemode survival
Videos : Part 1 Part 2 this works with all versions, just when go to chunker.app do not click on 1.20.0 but click the others.