IPhone – I can not turn off VoiceOver on iPhone 4S

Go into the keyboard settings and add a shortcut for the corrected spelling of the word. I had to do this with my daughter's name, as every time I spelled it, it would come out in capitals. You can just use a part of the word and it can auto spell the word for you, or you can spell it with a different capitalization and save the corrected version the other way.

If you need to use the first part of the word it may not work. Don't really know, but it worked for me ;-)

This should solve your video portion:

iStartupMovie is a new jailbreak tweak, which allow to play any video of your choice before the iOS home screen is displayed.This jailbreak tweak only add a “iStartupMovie Manager” to your iDevice and doesn’t effect on your other settings.

Once you have installed iStartupMovie, a new app will be appear on your Home screen. With this app, you can enable or disable the movies (MP4/M4V). Add videos of your choice to /var/mobile/Library/Startup Movies directory using either iFile (which can be obtained from Cydia).You can move as many videos into that directory as you want, in order to select which one you actually want to be played at bootup, launch the iStartupMovie Manager app and just pick your favorite video. The change should take effect immediately. There’s no apparent length limit for the boot up video but be reasonable.

You can Download iStartupMovie from Cydia’s BigBoss repository for free. You must jailbreak your iPhone before installing this tweak. You can follow our step by step Tutorial jailbreak your iPhone, iPad or iPod touch on iOS 4.3.5 using (PwnageTool), or on iOS 4.3.4 or on iOS 4.3.3

Reference:

http://techflipper.com/add-custom-startup-video-to-iphone-or-ipad-jailbreak-tweak/