Built a hackintosh and now you're stumped because Youtube and other Flash media just won't load properly no matter what you try?
I had the same problem and Googling leaves a bunch of unanswered questions.
Here's what I did:
Step 1) Install the most compatible video kext for your build (Even if QE/CI don't work)
Step 2) Install most updated version of Adobe Flash
Step 3) Install Google Chrome (most updated version)
Step 4) Open Google Chrome settings
Step 5) At the bottom, click Advanced Settings and uncheck the option for hardware acceleration
Step 6) Restart Chrome and open a Flash video, right click it and hit Settings
Step 7) Uncheck Flash's option for hardware acceleration
Step 8) Restart Chrome again and you should have full Flash support