I actually use an app called WiFi File Explorer. I got it free from one of the daily free apps from Amazon, but you can get it from any market. It is really easy to use and you just run it, and go the the PC your video file is on and connect to your Tab through your browser on the PC. You then just go to the file(s) you wanna upload and select it/them and send em on up. You can choose what folder on the TAB you wanna upload them too as well. Works well for both my TAB, and my Bionic. I also made a custom preset for Handbrake. One for DVD converting, and another one for converting from a 1080p source down to 720p. Keeping great quality on both and allowing them to be hardware accelerated. If you like I can either PM them too you, or attach them here.
Hope that helps.
-cm