Movavi

The Real Video Editing Fix for Out of Sync Audio

When I have audio sync issues, here's how I've solved it:

Open a video file and put it on the timeline
Detach the audio track (right-click and select detach audio): Audio will now appear as a separate timeline
Use the razor to cut near the beginning of the timeline about 0.5sec in
- Hover over the audio track when you do it. It will give you the impression it will cut the video track but it won't.
- If you zoom into the audio timeline enough, you may be able to see the moment audio start and use that as a visual cue for cutting
Select and delete the new lead-in audio timeline fragment
Drag the rest of the audio timeline up to the beginning
Test audio to be sure it's in sync

Undo and repeat as needed

The default Medium quality (higher than absolute middle quality) under Export Video > Advanced produces video that is acceptable quality once uploaded and processed by YouTube
Recently, I've found I've been able to move up to the High preset and files aren't that much larger and encoding is still relatively quick (250407)

YouTube will always make your video look worse than your original recording (ie. MKV) or even your encoding you use to upload to YouTube (ie. MP4)
Here's some examples of a Medium quality video and a Maximum quality encoding on YouTube

Video encoded at Medium quality (Go to 4m5s):

Video encoded at Maximum quality: