Page trying to rescaling when using typewriter code


#1

Hi new to this page and to code I am trying to use a typewriter effect on my page which works on a larger screen but when I scale down to 1440 wide the video in the background trying to rescale causing the screen to jump back and forth and create a left to the right scrollbar. I am sure there may be a simple solution but I cant work this out. any help would be grand. The page is http://www.gothinkcreative.co.uk/Agiletek/index.html
Please let me know if there are any solutions or alternatives you can offer or if you need any other info.
Thanks in advance.

UPDATE i have managed to stop the weird scaling issue but now have a left and right scroll bar?