Who beleive to this video???

Its very simple to understand.
My question is why the another textbox that should insert the phonenumber doesnt work. Only the one where we insert in message.
In conclusion, if you insert a phonenumber inside its doesnt work. You should insert it in the line of code. Why?
Mean its should work both once. Putting only the id, password in the line of code. That all!
Then there is someone here who can resolv it. 

I don't understand your problem. Two textboxes and the content of both is placed in the string.
The content of the to-box goes into a variable to and that is inserted in the string; similar for message.

I haven't tested, but what the video shows makes sense.