YouTube placeholder not working

[embarkd]

I've made a rectangle the size of the YouTube video I want to display and used the replace with HTML radio selection; copy and pasted YouTube code. Website preview shows only blank rectangle. Have tried putting the Placeholder in its own layer, no improvement. Also tried only using the <embed> portion of the code and not the <object> portion. No change.

Strangely also, in the preview even though I have put the video placeholder layer below other popup layers, the other popup layers still display beneath the video layer when opened.

(I have the most recent Web Designer update.)