I have an iPhone 4 . I jailbroke it and I wa son cydia downloading things on winterboard and it was respringing as usual but this time it just stayed in the apple logo. Its been a day and I've tried restoring it through itunes but it says my iPhone requirements don't have the built or something like that . And I try the home and power button as instructed on YouTube and nthing it still goes back to the apple logo I tried using redsn0w to reboot it and I don't know what happened but now its stuck on recovery mode . And I'm ging crazy please help me :(

Many of the people face the same problem and get stuck in this type of problem but the solution that you already mentioned is the only way.
Try again the home button and on switch as shows in YouTube video. It depends on the prefect trigger i.e; timing you will get through.
I had already come up from this type of problem in iPad and iPhone.