How to get python to download YouTube videos in the background?

[snippsat]

Beside question. Is it possible to create a Python code like the one below written in PHP? Several quality options are selectable, as shown here http://imgbox.com/YciMpWyC

youtube-dl has all this eg listformats youtube-dl -F

G:\1_youtube
λ youtube-dl -F https://www.youtube.com/watch?v=d8OI9FllKfg
[youtube] d8OI9FllKfg: Downloading webpage
[youtube] d8OI9FllKfg: Downloading video info webpage
[info] Available formats for d8OI9FllKfg:
format code  extension  resolution note
249          webm       audio only DASH audio   69k , opus @ 50k, 1.58MiB
250          webm       audio only DASH audio   90k , opus @ 70k, 2.09MiB
140          m4a        audio only DASH audio  127k , m4a_dash container, mp4a.40.2@128k, 3.89MiB
171          webm       audio only DASH audio  142k , vorbis@128k, 3.82MiB
251          webm       audio only DASH audio  161k , opus @160k, 4.14MiB
394          mp4        256x144    144p   95k , av01.0.05M.08, 25fps, video only, 2.41MiB
278          webm       256x144    144p   95k , webm container, vp9, 25fps, video only, 2.79MiB
160          mp4        256x144    144p  110k , avc1.4d400c, 25fps, video only, 2.06MiB
395          mp4        426x240    240p  208k , av01.0.05M.08, 25fps, video only, 4.71MiB
242          webm       426x240    240p  220k , vp9, 25fps, video only, 5.01MiB
133          mp4        426x240    240p  295k , avc1.4d4015, 25fps, video only, 5.03MiB
396          mp4        640x360    360p  364k , av01.0.05M.08, 25fps, video only, 8.06MiB
243          webm       640x360    360p  419k , vp9, 25fps, video only, 10.14MiB
134          mp4        640x360    360p  580k , avc1.4d401e, 25fps, video only, 10.25MiB
397          mp4        854x480    480p  623k , av01.0.05M.08, 25fps, video only, 13.27MiB
244          webm       854x480    480p  767k , vp9, 25fps, video only, 16.88MiB
135          mp4        854x480    480p  832k , avc1.4d401e, 25fps, video only, 14.78MiB
398          mp4        1280x720   720p 1183k , av01.0.05M.08, 25fps, video only, 24.68MiB
136          mp4        1280x720   720p 1212k , avc1.4d401f, 25fps, video only, 20.78MiB
247          webm       1280x720   720p 1472k , vp9, 25fps, video only, 23.73MiB
137          mp4        1920x1080  1080p 1641k , avc1.640028, 25fps, video only, 30.68MiB
248          webm       1920x1080  1080p 2108k , vp9, 25fps, video only, 30.32MiB
18           mp4        640x360    medium  547k , avc1.42001E, mp4a.40.2@ 96k (44100Hz), 16.74MiB (best)

Download eg 136 mp4 1280x720 720p 1212k.

G:\1_youtube
λ youtube-dl -f 136 https://www.youtube.com/watch?v=d8OI9FllKfg
[youtube] d8OI9FllKfg: Downloading webpage
[youtube] d8OI9FllKfg: Downloading video info webpage
[download] Destination: Komodo - (I Just) Died In Your Arms-d8OI9FllKfg.mp4
[download] 100% of 20.78MiB in 00:08

From a python script.

import youtube_dl

options = {
    'format': 'bestaudio/best',  
    'extractaudio': True,        
    'audioformat': "mp3",        
    'outtmpl': '%(id)s',         
    'noplaylist': True,          
    'listformats': True,   # print a list of the formats to stdout and exit
}

with youtube_dl.YoutubeDL(options) as ydl:
    ydl.download(['https://www.youtube.com/watch?v=d8OI9FllKfg'])

Output:
[youtube] d8OI9FllKfg: Downloading webpage
[youtube] d8OI9FllKfg: Downloading video info webpage
[youtube] Downloading just video d8OI9FllKfg because of --no-playlist
[info] Available formats for d8OI9FllKfg:
format code  extension  resolution note
249          webm       audio only DASH audio   69k , opus @ 50k, 1.58MiB
250          webm       audio only DASH audio   90k , opus @ 70k, 2.09MiB
140          m4a        audio only DASH audio  127k , m4a_dash container, mp4a.40.2@128k, 3.89MiB
171          webm       audio only DASH audio  142k , vorbis@128k, 3.82MiB
251          webm       audio only DASH audio  161k , opus @160k, 4.14MiB
394          mp4        256x144    144p   95k , av01.0.05M.08, 25fps, video only, 2.41MiB
278          webm       256x144    144p   95k , webm container, vp9, 25fps, video only, 2.79MiB
160          mp4        256x144    144p  110k , avc1.4d400c, 25fps, video only, 2.06MiB
395          mp4        426x240    240p  208k , av01.0.05M.08, 25fps, video only, 4.71MiB
242          webm       426x240    240p  220k , vp9, 25fps, video only, 5.01MiB
133          mp4        426x240    240p  295k , avc1.4d4015, 25fps, video only, 5.03MiB
396          mp4        640x360    360p  364k , av01.0.05M.08, 25fps, video only, 8.06MiB
243          webm       640x360    360p  419k , vp9, 25fps, video only, 10.14MiB
134          mp4        640x360    360p  580k , avc1.4d401e, 25fps, video only, 10.25MiB
397          mp4        854x480    480p  623k , av01.0.05M.08, 25fps, video only, 13.27MiB
244          webm       854x480    480p  767k , vp9, 25fps, video only, 16.88MiB
135          mp4        854x480    480p  832k , avc1.4d401e, 25fps, video only, 14.78MiB
398          mp4        1280x720   720p 1183k , av01.0.05M.08, 25fps, video only, 24.68MiB
136          mp4        1280x720   720p 1212k , avc1.4d401f, 25fps, video only, 20.78MiB
247          webm       1280x720   720p 1472k , vp9, 25fps, video only, 23.73MiB
137          mp4        1920x1080  1080p 1641k , avc1.640028, 25fps, video only, 30.68MiB
248          webm       1920x1080  1080p 2108k , vp9, 25fps, video only, 30.32MiB
18           mp4        640x360    medium  547k , avc1.42001E, mp4a.40.2@ 96k (44100Hz), 16.74MiB (best)