It does have a tag wiki that gives it a valid definition, sort of:
"Related to video tracking in computer vision field."
I think we do need a tag for that, even if the current name is an invitation to misuse. May I suggest, say, video-tracking (or maybe target-tracking, but that might still be too easy to misapply).
Edit: There's already a feature-tracking tag, but out of the seven questions currently using it, only three appear to match the definition given in the tag wiki, so I don't think it's a very good name to choose.
Update: I just created video-tracking, and I'll be retagging any appropriate tracking questions to it as I come across them.
Ps. I think I may have caused you to notice this tag right now: I've been going over the equally messy detection tag, trying to disambiguate it in preparation for (hopefully) eventual deletion, and I've probably bumped several questions formerly tagged with both to the front page in the process. I'd sort of assumed that the tracking tag was OK, since it did have a wiki, but I guess that was a mistake. I'll try to be more careful about that.
Pps. matching and analysis are two more similarly over-broad tags that I've come across in the same context. It's all a huge mess.