MysteryMutant123 #SaveEarth

1. Cộng đồng
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?

1. Cộng đồng
2. Technical Issues and Workarounds

When I want to look at how someone got their badge(in showcase), it shows "undefined." Can someone help?

1. Cộng đồng
2. General Khan Academy Questions

What are "unlisted videos"?