If you want click to play for just flash, try the extension FlashControl (https://chrome.google.com/webstore/detail/flashcontrol/mfidmkgnfgnkihnjeklbekckimkipmoe). It includes a icon that you can click and a blacklist for blocking out sites.
I'd advise to avoid knock-offs such as Flash Block (by josorek). They're built really quick and dirty and then abandoned until the right time to sell it to a third person who will then turn it in to malware to make money.