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Thank you for checking and advising back as well. I hope the OP has similar success.

Acorn

@Koshed, are you are currently viewing TG, does my offering in...

For the above, I had 5 snippets (or words) that I knew. It was just I could make a meaningful sentence with them. Mainly, it is understanding the question.

Acorn

Instead of Naming the Placeholder directly, you can add <div id="end"></div>, immediately after the IFRAME code in the Placeholder.
The subtle difference is the scroll goes to the bottom of the...

Yes it is possible.

I have had to mangle your approach with IFRAMEs, sadly, which is very elegant.

For each video link:

Replace each address with
javascript:...