Actually, I just fixed the other issue in place.
In fact, it was just a b tag that was added to HTML so I had to change the indexes here str(h2)[5:11] from 5:11 to 8:14 to extract the correct total number of movies.
I think this tool does nothing but download the .torrent file, not the movie and this is not quite practical.
I didn't expect that!
This tool should use some torrent client with (magnet link constructed from data returned from YTS API or the downloaded torrent).
I suggest using transmission as it's open-source and it has a nice command line!

When I did run this command :
yts-downloader 'aquaman'
I got this error :

Traceback (most recent call last):
  File "/home/seifeslimene/.local/bin/yts-downloader", line 8, in <module>
    sys.exit(main())
  File "/home/seifeslimene/.local/lib/python3.8/site-packages/yts_downloader/yts_downloader.py", line 23, in main
    movie_count = int((str(h2)[5:11].replace(',', '')))
ValueError: invalid literal for int() with base 10: '<b>34'

What's wrong?

Currently only a single instance is running to check each page of the website. Implement multi threading to speed up the process.