Thanks for letting us know. We're looking into it. Meanwhile, try a different device or browser to add cards to your videos. Keep us posted.
@TeamYouTube I can't add cards or endscreens to my latest video. Says it's private even though it's public. https://youtu.be/gqGsFYX4Wc4 pic.twitter.com/cE8k3Nydcm
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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