This post explains how to select it
I use a dell/ibm clone PC, not a Mac, but it's still relevant. Choosing the old code works. However, some youtubes do not allow embedding and I suppose that's what they were trying to "secure" with their upgraded procedures.
Thanks for suggesting the search which I did a few daze ago but didn't notice the Mac instructions post. Well I noticed it but thought, "I don't have a Mac soooo.....