The video is live. The audio is from a broadcast yesterday. You hear yesterday's news while watching today's video. Your reseller's audio and video are from different times. The audio stream is delayed by 24 hours.
A British IPTV reseller whose audio is from the wrong day has a time shift problem. The video source is current. The audio source is from a recording. The reseller never checked that audio and video are from the same time. You hear the past while watching the present.
The British IPTV services with correct sync use matching audio and video sources. Both are live or both are recorded. The reseller who mixed sources gives you temporal whiplash.
The IPTV reseller panel includes source selection. The reseller can choose which audio pairs with which video. Choosing wrong creates time mismatches. The resellers who don't verify leave you hearing yesterday.
The IPTV reseller UK operators who watch their own streams would notice that audio doesn't match the video's timing. They'd fix the source pairing. The resellers who never watch don't know that you're hearing the past.
Here's a specific scenario that creates confusion. You're watching live news. The video shows today's events. The audio is reporting yesterday's events. You hear about a story that ended yesterday while watching today's完全不同 story.
The mismatch is disorienting. You can't trust anything you hear. The reseller never checked that audio and video were from the same time. Your viewing experience is temporally broken.
I've tested audio video time matching across dozens of resellers. Most have matching sources. Some have mismatched sources where audio is delayed by hours or days. The reseller's lack of verification creates the problem.
A time matched British IPTV reseller will have audio that matches the video's timing. You can test this by watching live content where you know the current events. If the audio reports something that happened yesterday, the sources are mismatched.
The same principle applies to audio that's ahead of video. Some streams have audio from the future. The video is delayed. You hear what will happen before it happens. The careful reseller syncs everything to the same timeline.
A temporally correct British IPTV service will have audio and video from the same moment. Test by watching live content with known timing. If what you hear matches what you see, the sources are correct.