Got to admit I can hear your frustration on the video!! 
Basically you need to move that trigger a flow action to be the very first action in the flow. It also needs to trigger the phrase ‘takeover message’ and not the phrase ‘human’.
Then, you need to add ‘human [start]’ as a word or phrase that your human takeover flow listens too.
Finally, get rid of the ask a question and instead send a message inviting the user to click ‘human’ if they want to chat to a human. The shortcut should be the word human.
You also need to get rid of the filter on your catch-all.
So the effect is that all input ends up in your catch-all. If the bot is in takeover mode, you can redirect the message into the other flow. If not, you can invite the user to either use your other bot functions or say ‘human’ to engage human t/o mode.