"Still did" versus "still do" [closed]

I understand that "did" is past tense and "do" is present tense, but if you see a video of someone dancing a strange dance online, what is more correct to say:

"I didn't realize people still did this."

or

"I didn't realize people still do this."

The second seems more correct to me but the first sounds more correct.

Both sound fine. If I concentrate hard, I can find a small difference between the two: In the past tense, you would sound a hair more critical. In the present tense, you sound a bit more on the side of curious and open-minded (as long as your tone of voice projects a positive attitude as well).