I created a video of the correct length using the Windows built-in video editor and uploaded that. The problem is, to get this right, the link cannot have roman numerals (except for I and V) and the atomic weights cannot be too high.

So I kept re-uploading until I had a URL without roman numerals and without high atomic weights.

And then I took too long thinking about the next thing, even though it was trivial, and that dumb chicken starved.