Need help on Uniswap front run bot

Hi guys, so recently I have come across a video on MEV using bot to front run transactions on Uniswap.

The link of the video is: https://youtu.be/9yqF381Ws3g

Not sure if any of you have tried it out but I have tested it with 0.27 ETH and when I click “Start”, I notice there’s an internal transaction that transfer the ETH to another address and after few hours when I tried it to withdraw it, the ETH balance is zero. Does this means the bot used up all of my 0.27ETH paying for fees but fail to front run any of the transaction?

Appreciate if anyone of you can clear my doubt. Thanks in advance.