Fortunately there is a solution for this issue, I have done some research on the Internet and found several articles, tested some options and wrote all the steps that should be followed.
1. Download the Tor Browser Bundle (portable package) on your computer
Go to http://www.torproject.org/download/download.html.en and download the latest stable version of Tor Browser Bundle to your computer. Run the executable: tor-browser-1.3.15_en-US.exe and then you should see a folder with a name Tor Browser located in the same folder where you have saved the .exe file.
In order to run the Tor portable software you should open the Tor Browser folder and click on “Start Tor Browser.exe”
2. Change Tor settings for watching flash videos
Open Tor, then portable Firefox browser will start. Click on Tools – Add-ons – Extensions tab – Torbutton – Options – Security settings tab – uncheck the box “Disable plugins during Tor usage”. Click on OK.
3. Install the Adobe Flash Player on Firefox Portable (Tor)
3.1. If you already have Firefox and Flash installed on the computer
If you are using Windows 7 64-bit go to C:\Windows\SysWOW64\Macromed\Flash (for Windows 7 32-bit: C:\Windows\system32\Macromed\Flash)
Copy the files:
and paste them into your portable Tor Firefox browser plugins folder (for me it is: C:\Users\encounter\Desktop\Tor Browser\FirefoxPortable\App\Firefox\plugins)
Restart the portable Firefox
3.2. If you don’t have Adobe Flash installed on your computer (or if you want to install the latest flash version on the portable Firefox)