So i have a problem with my Stratocaster,you can hear it in the video(hope you can and it's not bad),the Low E and A string is buzzing in the open notes.I even tighted the neck,and the problem is still.Can anyone give me a guide to solve this problem?I think the main problem is with the nut,because if only 2 string is buzzing then the problem is not with the neck,but i'm not sure about it!       http://www.filedropper.com/mov0015

Seriusly guys that's the 5th time,that my high e string broke.Is that normal?!?!?!Or i restringd it wrong and should i take it to the guitarstore to chek it out if there is any problem?This is fist eletric guitar ever and i don't want it to be bad.(Vision Stratocaster)