lightningx1, how on earth do you get it to work with a GAP of 7500!?! I was going to help out with your issue, but the video you"re linking (same as spyrou007) has an "exact" GAP of 5240. Depending on how you got the mp3/video that might have to be adjusted a fraction, but nowhere near as much as more than two seconds.
But the line you're referring too:
F 1173 4 -12 Sign
F 1181 6 -12 says
Is exactly on point with a GAP of 5240.
#GAP:7500 worked for me from https://www.youtube.com/watch?v=9SOryJvTAGs, but needs editing at 73875s "Sign says" as its too soon for that lyric. Trying to edit this, but having a hard time figuring how to do this in Yass Editor.