1) Extract the Downloaded File which is named as 'CustomBootAnimationFiles.zip'. The Extracted Zip has Two Files namely 'bootanimation' and 'samsungani'.
2) Now copy these files to your SDCard.Copy them inside a folder so that u can locate them easily.I have used the folder 'Boot' in the video 3) Using Root Explorer move those two Files to 'system/bin/'. 4) Now using Root Explorer copy the Custom Boot Animation file to 'system/media'. 5) Rename the zip file to 'bootanimation.zip' (without quotes)
If u r in a Custom Rom,have the zip file of the particular rom in sd card before doin this.By chance if it stops at boot screen,just install the rom again without the data wipe