Anyone actually checking youtube keyword ranking successfully?

Partly. YouTube search is personalised far more than Google, so where your video shows up while you're logged in tells you very little. What I do: once a week, open a private window signed out and check the 5-10 terms I actually care about. More useful though is YouTube Studio, Analytics > Reach, then click YouTube search under traffic sources. That lists the real search terms people used to find you, which tells you what you rank for better than any tracker does.