The 2 videos found at need to be repaired;
As you can see by watching them, the sound is horribly out of sync with the lips of the people speaking.
Align this so they match.
Then upload back to the same Google Drive folder that you downloaded them from. This requires that you know how to use Google Drive, and can identify the correct user(s) to share with. This is part of the job requirement.
Thanks, and good luck!