that's weird, 0.8.3 just had two minor fixes:
1. change domain for thumbnail-image to i.ytimg.com
2. add "allowfullscreen" attribute to iframe
neither of those should break anything and as far as I know there's no CSP in there (I'm experimenting with CSP in a non-released version of my other plugin).
Can you describe how it doesn't work? What do (or don't) you see? Do you have a URL where I could go to check this out myself?