i use firefox 64-bit computer and i got an update notice today so i downloaded it, i go to youtube to watch a video but it every video says "this video is not available" then i go to other sites that play videos and those don't work, I tried to unintall then install it again but it did not work. I wanted to install an older version of adobe flash player but it doesn't allow that now I don't know what to do.
Welcome to Adobe Forums.
You can follow these steps to install an Older version of Flash Player
Step 1 : Download Adobe Flash Player uninstaller from here : http://download.macromedia.com/get/flashplayer/current/support/uninstall_flash_player.exe
Step 2 : Download and save the uninstaller, then close all the browser and run it.
Step 3 : Download Flash Player 11.2 installer from here : http://fpdownload.macromedia.com/get/flashplayer/current/licensing/win/install_flash_playe r_11_active_x_64bit.exe
Step 4 : Follow Step 2 again.
Hope this helps.