I have a Mac O SX Yosemite Vesrion 10.10.4 , Installed Flash 18,0,0,209 installed ans Safari version 8.0.7
After installing the latest Flash player the videos started showing a plug in failure. I looked on the forums and allow plug ins in the preferences for Safari. Now the video started playing but it is very slow to begin and only plays for a couple of seconds before going all dark. Either it plays for a couple of seconds and goes dark or never plays. Uninstalled and re-installed Flash and problem persists. Checked latest version of all systems and it is still not properly working.
I don't know what else I can do to try and fix this.