Please go to the Apple logo at the upper left of your computer screen to About This Mac and give me this information: • The exact system Version (listed right under OS X ??) • Processor • Memory
Were these videos taken with the phone?
OK that has nothing to do with flash. Did you see my offer to remote connect?
OK then please follow all these directions:
Reboot into the Recovery HD by choosing the ‘Apple‘ menu > Restart, then hold down the ‘Command’ + R’ keys on the keyboard during the start up process. If you can't get to that menu just hold the power button for 10 seconds until it shuts down. Then start it up again holding those keys. When you see the Apple Logo you can let go.
When the machine boots you may have to choose your language then you will see the OS X Utilities screen. Select the Disk Utility and then select Continue. Then in Disk Utility select Macintosh HD in the left column (if there are two with that name or it is named something else choose the first indented item) select the First Aid tab if it is not already selected, then click on Verify Disk on the far right. If that says “OK” in green type then select Repair Disk Permissions. If it is not ok let me know.
I waited for two hours and you never replied. What happened?