After the latest update of ios 7 none of the videos are playing in my iPad Air

Hello Ashok Ganesan,

Thank you for the details of the issue you are experiencing with watching videos on your iPad Air, as well as the slow Wi-Fi issue you are experiencing.

First, I recommend using these steps to troubleshoot the issue you are experiencing with watching videos (you can skip step 4 because it does not relate to the issue you are experiencing):

1. If a single application is not responding or stops responding when it opens, you can force it to close.
2. If the device is unresponsive or if certain controls aren't working as expected, restart your device.
3. If the device remains unresponsive or does not turn on (or power on),reset your device.
4. If there is no video or if the screen remains black, verify that the device has enough charge to turn on:
   1. If you are using an iPad, ensure that it's connected to the USB Power Adapter supplied with the device.
   2. Let charge for at least twenty minutes, then see if it starts normally.
   3. If there is no image on the screen, press the Sleep/Wake button to attempt to wake the device.
   4. If the screen displays a red battery icon, continue charging the device until the battery is fully charged.
5. If the above steps do not resolve the issue, or the if the screen remains black or shows a persistent Apple logo, try restoring with iTunes:
   1. Connect the device to your computer and open iTunes.
   2. If the device appears in iTunes, select and click Restore on the Summary pane. Learn more about restoring iOS software.
   3. If the device doesn't appear in iTunes, try to force the device into recovery mode, and then restore it.
6. If the above steps do not resolve the issue, contact Apple.

You can find the full article here:

iOS: Not responding or does not turn on

http://support.apple.com/kb/TS3281

If you get to step 5, I recommend backing up your iPad before performing the restore:

iOS: Back up and restore your iOS device with iCloud or iTunes

http://support.apple.com/kb/HT1766

I recommend the following steps for the Wi-Fi issue you described:

1. Be sure you're in range of your Wi-Fi router (access point).
2. Tap Settings > Wi-Fi and turn Wi-Fi off and on. If your W-Fi setting is dimmed, follow these steps.
3. Confirm that your Wi-Fi router and cable or DSL modem are connected to power, turned on, and connected to the Internet. If not, refer to your network administrator or Internet service provider (ISP) for assistance.
4. Restart your iOS device.
5. Tap Settings > Wi-Fi and locate the Wi-Fi network to which you're connected.
6. Tap and Forget this Network.
7. Try to connect to your desired Wi-Fi network.
   Note: You may need to enter your Wi-Fi password again if your network requires one.
8. Turn your Wi-Fi router off and on2. If your ISP also provides cable or phone service, check with them before attempting this step to avoid interruption of service.
9. Update your device to the latest version of software.
10. Update your Wi-Fi router to the latest firmware2. For AirPort Base Stations, install updates using the AirPort Utility.

If the issue is still unresolved Wi-Fi disconnects or signal strength is less than expected

1. Move closer to the Wi-Fi router (access point).
2. Check for sources of potential interference.
3. Remove any case, stand, or other accessories from your iOS device and see if signal strength improves.
4. Reset network settings by tapping Settings > General > Reset > Reset Network Settings. Note: This will reset all network settings including
   • previously connected Wi-Fi networks and passwords
   • recently used Bluetooth accessories
   • VPN and APN settings

You can find the full article here:

iOS: Troubleshooting Wi-Fi networks and connections

http://support.apple.com/kb/ts1398

Thank you for using Apple Support Communities.

Best,

Sheila M.