I have a iPad 4 but I cannot get sound when I video anything

There could be quite a few resons, so please check the following list. Not all of them might apply to your situation, but the all could cause sluggishness in your video conversation.

1. Make sure you are not obstructing the microphone with anything, including your hand. Usually the microphone is on the back side near the back side camera, and on the side near the volume buttons. You can check it's exact location by finding a tiny whole on the ipad body in these locations.

2. Check the wifi signal strength on the status bar. Having less than 3 bars means poor signal. That can really ruin call quality.

3. Try to make a voice only call on facetime. Video needs big data flow rates. If voice calling is good, but video call is bad, you or your talking partner may have a slugish internet connection.

4. If you are using mobile network for your internet/data connection it may become slugish from time to time. Mobile networks always prioritize phone calls over internet/data connection. So if lots of people are making phone calls on your area, yor data connection quality will drop, thus the facetime call using data connection will suffer the consequences by loosing quality.

5.Talking on facetime, or skype using video call is like streaming a video in realtime over internet, and it needs speedy and stable connection. If connection is bad, yor call may become sluggish.

6. Feedback prevention. Try to prevent the sound from your talking partner to get back to the microphone. Try wearing headphones.. Sometimes the sound is turned up so much that it gets back to the microphones, and in order to prevent causing a sound loop (the high piched sound you might heard eventually when people are using microphones on events) your ipad turns down your microphone for a short time trying to protect your ears :)

7. Try not to talk at the same time with your partner. When your partner is talking your microphone might be silenced. Because of what i described at point 6. Wait for your partners to finish their sentence and talk only after that.

iPad Volume Control How To Video Guide

If this doesn't work ??????

Try to reset the phone. If it doesn't work, check all the sound settings and the sound button on side. If all of those don't work, try factory restore. If it still doesn't work, make reservation for Apple Store Guinness bar.

Make sure your sound is turned up in the sound option under settings. Once that is done, double click the home button to reveal your desktop. Slide your finger up towards the top of your screen to reveal the sound controls at the bottom of your screen. Turn volume up to desired volume. Try playing your video again.

Go into settings: notification center : check your apps to make sure the sound is on for that app.

try turning the volume up. My iPad mini seems to have a lower volume level than my iPhones. The external speakers are almost inaudible unless turned way up, so I mostly use ear buds on it. But be careful using the earbuds! turn the volume down and gradually increase to a comfortable level,

1. If you have no sound at all, even in the Music App, try rebooting the iPad.
Reboot the iPad by holding down on the sleep and home buttons at the same time for about 10-15 seconds until the Apple Logo appears - ignore the red slider if it appears on the screen - let go of the buttons. Let the iPad start up.
2. If you lost sounds for keyboard clicks, games or other apps, email notifications and other notifications, system sounds may have been muted.
System sounds can be muted and controlled two different ways. The screen lock rotation can be controlled in the same manner as well.
Settings>General>Use Side Switch to: Mute System sounds. If this option is selected, the switch on the side of the iPad above the volume rocker will mute system sounds.
If you choose Lock Screen Rotation, then the switch locks the screen. If the screen is locked, you will see a lock icon in the upper right corner next to the battery indicator gauge.
If you have the side switch set to lock screen rotation then the system sound control is in the control center. Swipe up from the bottom of the screen to get to control center . Tap on the bell icon and system sounds will return.
If you have the side switch set to mute system sounds, then the screen lock can be accessed in the same manner as described above.
This support article from Apple explains how the side switch works.
http://support.apple.com/kb/HT4085
3. Try cleaning the dock connector opening of the iPad with a soft brush and just a little bit of rubbing alcohol.
4. Reset all settings. Settings>General>Reset>Reset All Settings.

Your iPad might be muted. Try switching the small switch on the right side of your iPad. It should be above the volume buttons.

The mute switch is on the right side of the iPad. Check your switch settings first:

Tap Settings > General.

Under "Use Side Switch to:", select Lock Rotation or Mute.
Settings > General

Make sure you're using it to mute, and then slide the switch to toggle mute on and off. Also use the volume rocker in case you have the volume set too low.

Try adjust the control panel to full volume. If it the volume is still too low to hear movie conversation, put the movie back to computer and use some video tool to set it volume up. I think the pavtube video converter can increase video volume by 400% by converting them.