Help Help! Duplicated, undeletable videos.

[graphing]

I recorded a video this morning. In my gallery, there are now three copies of this video. One is the original, I assume; it plays properly and so on. The other two have identical thumbnails (that differ from the first one) and there are two circles around the play button instead of one (concentric, like a target). When I click play they seem to load forever. I haven't gotten either of them to play yet. I also cannot delete them. When I select the thumbnail, there is simply no delete option.

How do I get rid of these things?! I'm not even sure where to find the videos in My Files. Edit: found the video. It was on my external SD card. But where are the weird duplicates?

Advice much appreciated,
g