Step-by-step guide to synchronize two YouTube videos with precise offset control using DualTube.
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Open DualTube→Paste YouTube URLs into the left and right player fields on dualtube.io.
Ensure the sync mode is set to "Linked" so both players follow the same timeline.
If one video starts at a different point (e.g., an intro), use the offset slider to shift the right video forward or backward in seconds.
Enable the A-B Loop feature to repeat a specific section while fine-tuning the sync offset.
Save your synced setup and share the URL with others. The offset and video IDs are encoded in the link.
DualTube syncs videos via the YouTube IFrame API with sub-second accuracy. The offset control allows fine-tuning by 0.1 second increments.
That is fine — the shorter video will simply end first. You can also use A-B Loop to focus on a specific segment.
DualTube supports two videos at a time. For more, you can open multiple tabs.
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