My final objective is to upload an edited video onto Facebook.

Here is the process that I have carried out and the problems that I am having:
1. I downloaded a video from Youtube.
2. I used AVS video editor to upload lyrics.
3. After I have uploaded the lyrics, video & audio are out of sync.
4. I do not know how to upload an edited video onto Facebook.

Please assist on the above point # 3 & 4.