Setting up YouTube Video Tracking in Google Tag Manager for GA4
1. Create Variables
In GTM, create the following variables:

Video Status
Video URL
Video Title
Video Percent
Video Visible

These are built-in variables in GTM's YouTube Video trigger.
2. Create Triggers
Create the following triggers:
YouTube Video Trigger - Start

Trigger Type: YouTube Video
This trigger fires on: Start

YouTube Video Trigger - Complete

Trigger Type: YouTube Video
This trigger fires on: Complete

YouTube Video Trigger - Progress

Trigger Type: YouTube Video
This trigger fires on: Progress
Progress threshold: 25%, 50%, 75%

3. Create GA4 Event Tags
Create the following event tags:
Video Start Tag

Tag Type: Google Analytics: GA4 Event
Event Name: video_start
Event Parameters:

video_title: {{Video Title}}
video_url: {{Video URL}}



Video Complete Tag

Tag Type: Google Analytics: GA4 Event
Event Name: video_complete
Event Parameters:

video_title: {{Video Title}}
video_url: {{Video URL}}



Video Progress Tag

Tag Type: Google Analytics: GA4 Event
Event Name: video_progress
Event Parameters:

video_title: {{Video Title}}
video_url: {{Video URL}}
progress: {{Video Percent}}



4. Link Tags to Triggers

Link the Video Start Tag to the YouTube Video Trigger - Start
Link the Video Complete Tag to the YouTube Video Trigger - Complete
Link the Video Progress Tag to the YouTube Video Trigger - Progress

5. Test and Publish
Use GTM's preview mode to test your setup, then publish your container when everything is working correctly.