The first one just shows cloning, adding a file and then pushing the commits:
unicode: https://ptpb.pw/t/1kkA
no-unicode: https://ptpb.pw/t/gkoq
The next video is how to use rebase when the code on the server is ahead of the local and you have commits you want to push. Unlike merge it helps to preserve commit history.
unicode: https://ptpb.pw/t/pKxl