what does the omega symbolΩ mean i know its roman and i know this question is kinda off topic but just curious

⚑ Flag

Omega Ω is the last letter of the Greek alphabet which begins with the letter Alpha Α.  This the capital form of the letter.  It is ot related at all to theory of evolution as tagged here in your question and I don't see any reference in the connected video to the letter.  Sometimes it is used to mean the end of something as in the phrase God uses in the Book of Revelation:  I Am the Alpha and the Omega.  Omega is often used to represent resistance in electrical circuits.