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MysteryMutant123 #SaveEarth

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Videos watched
1. Community
2. Technical Issues and Workarounds
On my account, it shows that I have watched 0 videos but I know I've watched a lot of videos. Why is this happening?
"undefined" message.
1. Community
2. Technical Issues and Workarounds
When I want to look at how someone got their badge(in showcase), it shows "undefined." Can someone help?
What are unlisted videos?
1. Community
2. General Khan Academy Questions
What are "unlisted videos"?