Hello, QQ Music on the projector shows that the video cannot be played temporarily. There may be several reasons:

1. Network problem: If the network is unstable or slow, it may This will cause the video to fail to play. You can try to reconnect to the network or change the network environment.

2. Copyright issues: Some videos may be protected by copyright and cannot be played without purchasing the relevant copyright or authorization.

3. Equipment problems: The projector or audio equipment may have malfunctions or connection problems, causing the video to not play properly. You can check whether the device is connected correctly, or try restarting the device.

4. Software problems: QQ Music software may have bugs or version incompatibilities, which may cause the video to fail to play. You can try updating the software or using another player.

To sum up, QQ Music on the projector shows that the video cannot be played temporarily. There may be many reasons, which need to be investigated and solved according to the specific situation.