I need help!

I need help with my circuit

I've been trying to recreate the circuit on this video (https://youtu.be/38kVFDdDC8A), and every time I turn it on I get an warning on my LED lights.
I ask you to send me a link with any circuit were you can use a battery with less voltage (Like 2.5V or 2V). Btw it has to be more than 1.5V, I already tried. 
Thanks! :)  


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