Update

-Added auto download ffmpeg if not installed

improve code

- [scrap post] Reduce data duplication
- Add back option
- Added check if option not available is selected.

Delete myfans_scrap.py

Update myfans_dl.py

- Change output name to post_id.
- Change the output by separating name_creator into a folder.

Update README.md

Update myfans_dl.py

Update myfans_dl.py

Update README.md