register Youtube scheduled live reminder in macOS calendar (a calendar named "Youtube" need to be created before running this script)

ytReminder.sh

#!/bin/bash

tmp=/tmp/yt.html
url="$1"

if [ -z "$url" ]; then
	echo "USAGE: $0 URL"
	exit 1
fi 

curl -sL "$url" > $tmp
title=`grep -m 1 -o 'title":"[^"]*' $tmp | sed 's/^title":"//'`
location=`grep -m 1 -o 'name": "[^"]*' $tmp | sed 's/^name": "//'`
startTime=`grep -m 1 -o 'scheduledStartTime":"[^"]*' $tmp | sed 's/^scheduledStartTime":"//'`
startTime=`date -d "$startTime" +%s`

rm $tmp

osascript -l JavaScript -e 'function run(argv){
    let url = argv[0]
    let eventStart = new Date(argv[1] * 1000)
    let location = argv[2]
    let title = argv[3]

    if (argv.length != 4)  {
        return "Usage: URL STARTTIME LOCATION TITLE"
    }

    var app = Application.currentApplication()
    app.includeStandardAdditions = true
    var Calendar = Application("Calendar")
     
    var eventEnd = new Date(eventStart.getTime() + 1000)

    var ytCalendars = Calendar.calendars.whose({name: "Youtube"})
    var ytCalendar = ytCalendars[0]
    var event = Calendar.Event({summary: title, startDate: eventStart, endDate: eventEnd, url: url, location: location})
    var len = ytCalendar.events.push(event)
    Calendar.reloadCalendars()

    // Set alarm at 5 min before the event start
    var displayAlarm = Calendar.DisplayAlarm({triggerInterval: -5})
    ytCalendar.events[len - 1].displayAlarms.push(displayAlarm)
    Calendar.reloadCalendars()
}' "$url" "$startTime" "$location" "$title"