Welcome Zainbrain,
It sounds like the audio doesn't match your video when using Bluetooth, USB, or CarPlay. We'll do our best to help out with this.
You've done some pretty good troubleshooting so far, nice work. Does this occur when playing back specific videos or when using a certain app? Have you noticed any common behaviors? For example, are you streaming these videos or are they downloaded to your iPhone and iPad? Are you connected to Wi-Fi or cellular, when this occurs? Are both devices up to date?
If you haven't yet, we'd try out these related steps in: If you hear no sound or distorted sound from your iPhone, iPad, or iPod touch speaker - Apple Support
If you hear no sound or distorted sound from your iPhone, iPad, or iPod touch speaker
If you can't hear a person's voice clearly, hear crackling, hear static, or have issues with sound quality, learn what to do.
Follow these steps
1. If your device has a Ring/Silent switch, move the switch forward—toward the device's display—so that orange isn't showing. If you're using an iPad, you can also swipe down from the top-right corner to open Control Center and make sure that Silent Mode is off.
2. Open Settings > Focus > Do Not Disturb and make sure that Do Not Disturb is off.
Contact Apple Support
If you checked the sound settings and your device still has sound issues, contact Apple Support to discuss service options.
If you want to try more steps on your own
If you prefer, here are some more steps you can try on your own. After following these steps, you might still need to contact Apple Support to discuss service options.
1. Remove all screen protectors, films, or cases from your device.
2. Check the speaker opening to see if it's blocked or dirty. On iPhone only, make sure that the receiver isn't blocked or dirty.
3. If necessary, clean the speaker or receiver opening with a small, soft-bristled brush. Make sure that the brush is clean and dry.
4. Go to Settings > Sounds (or Settings > Sounds & Haptics), and drag the Ringer and Alerts slider back and forth a few times. If you don't hear any sound, or if your speaker button on the Ringer and Alerts slider is dimmed, your speaker might need service.
5. If you hear sound, try making a call with your iPhone and turn on speakerphone. On iPad or iPod touch, make a FaceTime call. If you still can't hear, or hear static or crackling, then your network or reception could be the issue. Try to call again later, or from a different location.
FaceTime isn't available in all countries or regions.
Let us know if that helps out or not, take care.
