Noted. I use Blogger Beta (well not Beta now) version. As you write the post in Blogger, there are two tabs on is to compose as per usual and the other is the same but show the HTML. The biggest error I get is with embedded links in code to copy and past (not just YouTube actually).

It always seems to come back that the code for the link (which it highlights nicely so I don’t have to go looking for the error it perceives) and says the the tag is not closed. Perhaps that’s all I need do is add the closing tag. Sometimes that works sometimes… not so much. Probably because my ability to a) read code is poor and thus b)knowing what tag to use is vague.