Control Event Video timing with Javascript?

This script will get the videos and set the start time to 10 seconds for each video and pause it at 15 seconds. Change the 10 and 15 to the start and end times of your videos:

var vids

const myTimeout = setTimeout(getVideo, 1000);

function getVideo() {
vids = document.getElementsByTagName("video");
vids[0].currentTime = 10;
vids[0].addEventListener("timeupdate", endVideo1)
vids[1].currentTime = 10;
}

function endVideo1()
{
if ( vids[0].currentTime > 15 )
{
vids[0].pause();
}
}

function endVideo2()
{
f ( vids[1].currentTime > 15 )
{
vids[1].pause();
}

Do you embed the videos? If you stream them from YouTube or Video, you can use the functionality of those platforms to reach your goal: control the start point and the duration which is defined by the end point.