How to reboot an iPad, a video clip is stuck on running

i think holding on button and volume up button simultaneously for 20 secs works on most devices, maybe worth a try

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Not an ipad.

push the home button twice to bring up all active apps; swipe them all one at a time to the top of the screen, or, hold both the home and power button down for 10 seconds to force a hard shutdown.

This tutorial will explain how to force your iPad to restart if it gets stuck or freezes up.
Forcing your iPad to restart will not cause any loss of data - with the possible exception of any work you were doing at the time the iPad and/or App froze, forcing you to restart it.

Click and hold down the Sleep/Wake button (located on the upper-right corner of your iPad). While you're holding down the Sleep/Wake button, hold down the Home button as well (located on the front of your iPad at the bottom). Hold down both buttons until your iPad powers off. It will reboot and start again with a small silver Apple image on the screen. It takes about 30 seconds for the iPad completely start up.

If u swipe from the bottom up, to get to the control center (or go to settings), is the orientation locked, or unlocked?

If you've got a locked up iPad app or otherwise misbehaving iPad, and want to reboot / reset your iPad, simply hold the sleep and home buttons together until the iPad restarts.
You'll see the shutoff slider come up first, but just keep holding. The screen will go blank and the Apple logo will reappear as the iPad reboots.
Note: this does not reset any data on your iPad. This is just a restart, equivalent to rebooting your computer.

If the iPad will not reboot using the standard "Hard Reboot" (holding the power button and home button until the iPad restarts.) then I would advise restoring the iPad using iTunes which will set it back to factory settings.

Step 1
To reset the Apple iPad you should first locate the power button. This is the button on the top right corner of the iPad when you are holding it like a book, with the narrower sides on the top and bottom.
Step 2
Once you have located this button you will need to simply hold this button down for about 3 seconds or until you see the red slider icon (a red rectangle with a white arrow facing toward the right) come across the top of the screen. The slide area or the area to the right of the button will be labeled Slide to Power Off.
Step 3
If you want to just reboot to iPad you can do that by touching the red slider button and sliding your finger along the slider area toward the right side of your iPad. The iPad will automatically start shutting down, it may take it several seconds depending on the amount of space you are using on your iPad and the programs you had running when you requested the reboot.
Step 4
To turn the iPad back on or restart it after you have shut it down just press the power button (remember that's the button on the top right of the iPad).

If you haven't already done so, you have to download the Pogo application from the iTunes app store. If your problem is with the app itself, the first step would be to reboot your device. To reboot the iPad, hold down the button on the top of the iPad until you get the option to shut down the device. Once shut down, press the same button to power on the iPad. Test the Pogo app to see if it works now.