Thank you for explaining that very important detail that had me confused for so many hours, in WordPress and most forums (i think), you can live preview the imbedded YouTube videos and interact with them, hence I was wondering if it was my fault
(edit) It finally works, its just as you said, the live preview was not previewing the imbedded video until it created the post, AFTER I created the post, the embedded video started to work and be interactive.
Thank you so much for your help, hopefully someone else who might also be a noob learns from my mistakes.