There is always a delay when streaming audio from your device to a receiver (Apple TV, AirPlay speakers, Sonos, Network Player, TuneBlade, Bluetooth, etc.). This is not a big issue when streaming music but any video will become out of sync. This addon attempts to solve this issue for YouTube. One time set up: - Play a YouTube video - Go to the addon's Options - Adjust the latency slider until the audio becomes in sync with the video - You can disable the sync adjustment by clicking on the addon icon. YouTube Audio/Video Sync works by muting the original video and reloading the audio adjusted to the selected delay. Note: -YouTube Live Videos are not supported. -This extension (at least for now) will only work on youtube.com, embedded YouTube players on other websites will not work. This is an open source project, licensed under GPLv3 https://github.com/adrian-ilie/av-sync