If the video is too long and you wish to get rid of the sources badly, then please read on.
1) Go to Cydia 2) Tap Search 3) Type in "iFile" 4) Install either iFile or iFile Cracked (only if you have the SiNfuL iPhone source) 5) Hit the home button 6) Tap iFile 7) Go to private/etc/apt/sources.list.d/cydia.list 8) Hit cydia.list, and then tap edit on the upper left hand corner. 9) Go all the way to the end of the line where you see the source that is giving you trouble, and delete the entire line. 10) Tap the Save button on the upper right-hand corner. 11) Go back home, and Restart Springboard. (How you respring is entirely your choice)