$ pip install cmdtube

$ python -m pip install cmdtube

$ python -m pip install git+https://www.github.com/Samuel-HSSP/cmdtube

>>> from cmdtube import cmdtube
...
# To search YouTube for 'How to debug without Stack Overflow'
CMDTube> cmdtube -search How to debug without Stack Overflow

Usage: cmdtube [-i INFO]

Positional argument:
  -i INFO, -info INFO
                        get information about the video using its URL.

Usage: cmdtube [-s SEARCH_QUERY] [-r RESULTS]

Positional arguments:
  -s SEARCH_QUERY, -search SEARCH_QUERY
                        search YouTube for desired query

optional arguments:
  -r RESULTS, --results RESULTS
                        The maximum number of results to display.
                        For now, the default value is 10 and maximum is 19.

Usage: cmdtube [-s SEARCH_QUERY] [-r RESULTS] | cmdtube [-w WATCH]

Positional arguments:
  -s SEARCH_QUERY, -search SEARCH_QUERY
                        search YouTube for desired query
  -w WATCH, -watch WATCH
                        the index of the video to watch, from the displayed
                        search result. It should not be more than the total
                        number of videos from the search results.
                        To watch the first video, use 1.
Optional arguments:
  -r RESULTS, --results RESULTS
                        The maximum number of results to display.
                        This determines the index of the video to download. It
                        must not be greater than the maximum number of results.
                        For now, the default value is 10 and maximum is 19

Usage: cmdtube [-s SEARCH_QUERY] [-r RESULTS] | cmdtube [-d DOWNLOAD]

Positional arguments:
  -s SEARCH_QUERY, -search SEARCH_QUERY
                        search YouTube for desired query
  -d DOWNLOAD, -download DOWNLOAD
                        the index of the video to download, from the displayed
                        search results. It should not be more than the total
                        number of videos from the search results.
                        To download the first video, use 1.
                        Note that it will always download the highest resolution
                        of the video. More functionalities will be added later.
Optional arguments:
  -r RESULTS, --results RESULTS
                        The maximum number of results to display.
                        This determines the index of the video to download. It
                        must not be greater than the maximum number of results.
                        For now, the default value is 10 and maximum is 19

Usage: cmdtube [-s SEARCH_QUERY] [-r RESULTS] | cmdtube [-i INFO]

Positional arguments:
  -s SEARCH_QUERY, -search SEARCH_QUERY
                        search YouTube for desired query
  -i INFO, -info INFO
                        the index of the video from the displayed
                        search results. It should not be more than the total
                        number of videos from the search results.
                        To get information about the second video shown in the
                        search result, use 2.

Optional arguments:
  -r RESULTS, --results RESULTS
                        The maximum number of results to display.
                        This determines the index of the video to download. It
                        must not be greater than the maximum number of results.
                        For now, the default value is 10 and maximum is 19

Usage: cmdtube [-d DOWNLOAD] [-t TYPE] [-f FORMAT] [-res RESOLUTION]

Positional arguments:
  -d DOWNLOAD, -download DOWNLOAD
                        URL for video or playlist to download
  -t TYPE, -type TYPE
                        could be either `video` or `playlist`

Optional arguments:
  -f FORMAT, -format FORMAT
                        video format to download. Could be one of `mp4` and `3gp`.
                        More video formats will be supported in future versions
                        By default, it will download the mp4 format.
  -res RESOLUTION, -resolution RESOLUTION
                        resolution of the video to download.
                        Ex: 360p, 480p, 720p, 1080p, highest, lowest
                        If highest, it will download the video in the highest resolution.
                        Otherwise (if lowest), it will download the video in the lowest
                        resolution.
                        By default, it downloads the video in the highest resolution.

Usage: cmdtube [-d DOWNLOAD] [-t TYPE]

Positional arguments:
  -d DOWNLOAD, -download DOWNLOAD
                        URL for video or playlist to download
  -t TYPE, -type TYPE
                        must either be `audio` or `playlist-audio` here

pip install pytube

pip install youtube-search