After integrating your YouTube channel or playlist with the app, you may see that some of your videos display an error message when you select them. Below we will examine the likely reasons why this may be:
Your videos have been flagged for copyright
If your video has copyrighted material, such as a piece of music, YouTube's algorithm will often automatically detect this and give your video a copyright strike. This does not mean that the video will be taken down, but rather, it will restrict the video's ability to be embedded. Often times (but not always), the copyrighted music will be displayed in the video's description.
In order to lift the copyright restriction so that the video can be embedded in the app, the copyrighted media will need to be removed from the video.
Video embedding needs to be turned on in your YouTube settings
In your YouTube settings, go to Creator Studio, then click Video Manager. On the video in question, click Edit, then Info & Settings. Open the Advanced Settings tab, and under Distribution Options check the "Allow embedding" box. Click the Save button and your video should now be able to be embedded!