"@CC. WTF did you do!?"
Well, it had been so long since I've used start/stop times as part of the embed code that I did briefly debate whether or not I should Google it; posting a quick video on my way out I wrote the code like this:
src="URL removed/embed/8-OegIMGh5g?start="1" end="2"...
When it should have been:
src="URL removed/embed/8-OegIMGh5g?start=1&end=2"...
You can see that only two quote marks are used for enclosing the "src=" parameters where everything after the "?" should be separated by ampersands.
I won't be making the same mistake again.
Edit : URL removed to prevent being displayed as an actual link so no more shit hits the fan.