Quick fix in Javascript HTML snippet for Google Tag Manager

I've used David Vallejo HTML video https://www.thyngster.com/tracking-html5-videos-gtm template for video tracking. I've just changed var divisor value from 10 to 5 to push events in multiple of 5 to make custom events for 25%, 50%, 75% and 90%. But somehow after 5% it's not pushing any events till 50% and form there it pushes all the events in multiple of 5 till 95%. I tried looking into the HTML listener tag but couldn't spot the reason. What might be causing this?


Tag code here : https://pastebin.com/Ba4Z3Sfu