No. I believe it is 5 seconds per mile. IOW, when lightning hits, it takes 5 seconds to travel a mile. If I saw that flash and then counted 5 seconds, it would mean it was a mile away but since I counted just under a second as you can hear in the video, that lightning strike was less than a quarter mile away.
Five seconds per mile is correct.
Lighting doesn’t always go down, it can go any direction and often goes horizontal, so the origin of that strike could have begun over your head at 1000 feet in the cloud base (a second away) while striking the Earth at some greater distance. Just one of many possibilities. But its usually best not to hang out in thunder storms :)