Hey there Holgy,
It sounds like you are having issues with using Airplay with the iPhone, and also cannot view your music videos in landscape mode anymore.
First for the Airplay I sugget the troubleshooting from this article named:
iOS: Troubleshooting AirPlay and AirPlay Mirroring
Troubleshooting performance issues with AirPlay or AirPlay Mirroring
If you are experiencing intermittent playback or significant network lag with AirPlay or AirPlay Mirroring, it could be due to a weak Wi-Fi connection, interference, or the distance between the Wi-Fi router and your iOS device, Apple TV or AirPort Express.
Try the following suggestions:
- Ensure that other devices are not trying to stream to the same Apple TV at the same time.
- Turn off Bluetooth on your iOS device by tapping Settings > Bluetooth.
- Ensure that your Wi-Fi router is set up with the recommended settings for the best performance.
- Certain external devices, such as microwave ovens and baby monitors, may interfere with a Wi-Fi network. Try moving or disabling these devices.
- If possible, try to locate your Wi-Fi router in the same room as your iOS device and Apple TV.
- If your wireless and wired networks are the same, try connecting your Apple TV to the router via Ethernet instead of Wi-Fi.
- If the Wi-Fi router has an external antenna, check to see that is it connected properly and in good condition.
- Use the Wi-Fi network troubleshooting guide to resolve interference and other issues.
For the other issue, I would check to see if rotation lock is turned on or not.
iOS: Screen does not rotate
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This doesn't help at all.
- I have no issue with AirPlay, the connection clearly works as the Apple TV plays the music.
- It is also not a rotation lock issue, as rotation lock would only inpact morroring but not regular AirPlay.
To me it seems there is an issue with the "video out" support of the music player, which seems to not exist while the iPhone is still insisting it does by telling me "Video is playing on Apple TV" (in iOS 7.0 till iOS 7.0.2) or showing the screen symbol to indicate active video out in iOS 7.0.3.
Hey, Holgy, unlike some other people in this thread, I understand your problem, and did not assume you are a moron who doesn’t know how to turn off the portrait lock.
I have the same problem. When playing a music video from my iPhone to Apple TV, only the sound is played. And, you can’t watch videos in landscape. When you turn the phone, you get a sea of album covers instead of your video.
I was able to get around both problems by playing music videos with the Videos app – not the Music app. Music videos played in landscape on the phone. When I used AirPlay the AppleTV showed video, not just audio.
The drawback is that the Videos app is poorly organized. It is sorted only by song title, not by artist or album. It does not have a search feature that I could find, nor does it have the alphabet selector down the right side of the screen. This is fine if you have only a few videos, but if you have a lot, it would be a mess.
LANDSCAPE MODE IN THE MUSIC APP
Other people complained about not being able to play music videos in landscape (from the Music app). Apple says the feature is no longer available. See response by “bluebearies” in this thread.