Connect your iOS device to the same Wi-Fi network as your Receiver(maybe Apple TV or BiJie Meeting Box).

Find the video that you want to AirPlay.

Tap  airplay-icon-3. In some third-party apps, you might need to tap a different icon first.*

In the Photos app, tapios-airplay-icon3

then tap airplay-icon-3.

Choose your Receiver.

In such simple steps, you can easily wireless display the video that you like.