Are you trying to play a personal video? Employees need to add a YouTube link to their profile. If they haven't, and you're trying to play a personal video, nothing will show up.
In some cases, you need to interact with the TV to enable autoplay of videos. Click the side arrow buttons on your TV remote or move the cursor (if applicable).
Does the same thing happen when you add the slideshow to a different TV? Does it also stop working if you open it on your computer?
Are you using the Plecto app for TV or your TV browser? If you're using the app, try activating your slideshow on TV browser via tv.plecto.com. Or, if you're using the browser, try the Plecto app.
Are your TV and the Plecto app up to date?
Has your organization blocked access to YouTube? If so, you might not be able to play the videos.
To check your TVs compatibility with YouTube, open this link in your TV browser: youtube.com/iframe_api
If the TV can successfully download the script (you should see some text on the screen), it means your TV is capable of playing videos from YouTube.
Check the notification logs in Plecto. Open the notification, then click Log of triggered notifications. If Plecto sent the notification and you didn't receive it, there might be something in the configuration.
1. Have you added the correct teams? Or employees?
2. Check if you're sending the notification to the correct slideshow.
3. Check the Enabled from this date field.
Try clearing cache and history on your TV.

TV Troubleshooting Guide

Having issues with your TV?