diff --git a/core/core.py b/core/core.py
new file mode 100644
index 0000000..b195ae8
--- /dev/null
+++ b/core/core.py
@@ -0,0 +1,42 @@
+from __future__ import unicode_literals
+import youtube_dl
+from feedgen.feed import FeedGenerator
+import os
+import sys
+import __main__
+import argparse
+import ydl
+import interface
+import tkinter as tk
+
+#TODO:
+# offer download video option
+# create good README.md
+# .gitignore
+# LICENSE
+
+parser = argparse.ArgumentParser()
+parser.add_argument("-i","--interface", help="Launch GUI (beta)",action="store_true")
+parser.add_argument("-s","--simulate", help="Do not download videos, just do as if",action="store_true")
+parser.add_argument("-q","--quiet", help="Very quiet option for youtube-dl",action="store_true")
+parser.add_argument("-f","--feed", help="Create Podcast feed",action="store_true")
+parser.add_argument("-video", help="Download videos instead of creating audio",action="store_true")
+parser.add_argument("-d","--dir", help="Define download directory for files, default value:'~/Vidéos'", default="~/Vidéos")
+parser.add_argument("-url","--podcast_url", help="Define base url for podcasts, default value:'http://podcasts.lutix.org'", default="http://podcasts.lutix.org")
+parser.add_argument("-yturl","--youtube_url", help="Define youtube url to fetch", default ="https://www.youtube.com/watch?v=xJO5GstqTSY&list=PLxzM9a5lhAumFRpcigmGY1QLDYxb4-P2B")
+args = parser.parse_args()
+
+
+
+if __name__ == "__main__":
+    if not args.interface:
+        ydlo = ydl.ydl_object(args)
+        ydlo.print_infos()
+        ydlo.process_args()
+    else:
+        print('Waiting for interface to be loaded...')
+        root = tk.Tk() #create window
+        root.title("Ydl - Youtube downloader")
+
+        app = interface.Interface(master=root) #create all components inside the window
+        app.mainloop()
diff --git a/core/interface.py b/core/interface.py
new file mode 100644
index 0000000..6a39b29
--- /dev/null
+++ b/core/interface.py
@@ -0,0 +1,86 @@
+import tkinter as tk
+from tkinter import filedialog
+import os
+import sys
+
+class Interface(tk.Frame):
+    def __init__(self, master=None):
+        super().__init__(master)
+        self.master = master
+        self.create_widgets()
+
+    def create_command(self):
+        if os.path.split(sys.argv[0])[1] == 'core.py':
+            command = 'source {}/venv/bin/activate & {}/venv/bin/python {}'.format(os.path.dirname(os.path.abspath(sys.argv[0])),os.path.dirname(os.path.abspath(sys.argv[0])),os.path.abspath(sys.argv[0]))
+        else:
+            command = '{}'.format(os.path.abspath(sys.argv[0]))
+
+        for key in self.args:
+            if bool(self.args[key].get()):
+                print('{}: Option non vide'.format(key))
+                if self.args[key].get() in [0,1]:
+                    value = ''
+                else:
+                    value = '\'{}\''.format(self.args[key].get())
+                command = '{} --{} {}'.format(command,key,value)
+            else:
+                print('{}: Option vide'.format(key))
+
+        print(command)
+        return command
+
+    def process_window(self,command):
+        term_window = tk.Toplevel(self.master,height='600',width='600')
+        term_window.title("YDL: process in progress")
+        wid = term_window.winfo_id()
+        for key,value in self.args.items():
+            print('{} : {}'.format(key,value.get()))
+        system_command = 'xterm -into {} -geometry 400x200 -hold -sb -e \"{}\" &'.format(wid,command)
+        print(system_command)
+        os.system(system_command)
+
+    def select_directory(self):
+        folder_selected = filedialog.askdirectory()
+        self.dir.set(folder_selected)
+
+    def create_widgets(self):
+
+        tk.Label(self.master, padx=10,text="Youtube URL",bg="red").grid(row=0,columnspan='1')
+        tk.Label(self.master, padx=10,text="Folder").grid(row=1,columnspan='1')
+        tk.Label(self.master, padx=10,text="Podcast website root").grid(row=2,columnspan='1')
+
+        # Vars attached to args
+        self.youtube_url = tk.StringVar()
+        self.dir = tk.StringVar() 
+        self.podcast_url = tk.StringVar()
+        self.simulate = tk.IntVar()
+        self.feed = tk.IntVar()
+        self.video = tk.IntVar()
+
+        # Default values
+        # TODO: 
+        self.youtube_url.set('https://www.youtube.com/watch?v=xJO5GstqTSY&list=PLxzM9a5lhAumFRpcigmGY1QLDYxb4-P2B')
+        self.dir.set('~/Vidéos')
+        self.podcast_url.set('podcast.lutix.org')
+
+        tk.Entry(self.master,width=70,textvariable = self.youtube_url).grid(row=0, column=1,columnspan='8',sticky='W')
+        tk.Entry(self.master, textvariable = self.dir).grid(row=1, column=1,columnspan='6',sticky='WE')
+        tk.Entry(self.master,width=70, textvariable = self.podcast_url).grid(row=2, column=1,columnspan='8',sticky='W')
+        tk.Checkbutton(self.master, text="simulate", variable=self.simulate).grid(row=3,column=1,sticky='WE')
+        tk.Checkbutton(self.master, text="feed", variable=self.feed).grid(row=3,column=2,sticky='WE')
+        tk.Checkbutton(self.master, text="video only", variable=self.video).grid(row=3,column=3,sticky='WE')
+
+        self.args = {'youtube_url':self.youtube_url,'dir':self.dir,'podcast_url':self.podcast_url,'simulate':self.simulate,'feed':self.feed,'video':self.video}
+
+
+        tk.Button(self.master,text='Choose folder', command = self.select_directory).grid(row=1,column=8,sticky='WE')
+        tk.Button(self.master,text='Process', command = lambda: self.process_window(self.create_command())).grid(row=4,column=8,sticky='WE')
+
+
+if __name__ == "__main__":
+    root = tk.Tk() #create window
+    root.title("Ydl - Youtube downloader")
+
+    app = Interface(master=root) #create all components inside the window
+    app.mainloop()
+
diff --git a/core/ydl.py b/core/ydl.py
new file mode 100644
index 0000000..d959288
--- /dev/null
+++ b/core/ydl.py
@@ -0,0 +1,118 @@
+from __future__ import unicode_literals
+import youtube_dl
+from feedgen.feed import FeedGenerator
+import os
+import sys
+
+class ydl_object:
+    def __init__(self,args):
+        self.args = args
+        self.infos = self.fetch_info()
+#        print(self.args)
+
+    def fetch_info(self):
+        print('Fetching Youtube Link informations...')
+        return youtube_dl.YoutubeDL({'quiet':True,'ignoreerrors':True}).extract_info(self.args.youtube_url, False)
+
+    def create_feed(self):
+        """
+        replace results by info
+        #results keys
+        _type entries id title uploader uploader_id uploader_url extractor webpage_url webpage_url_basename extractor_key
+        """
+        fg = FeedGenerator()
+        fg.load_extension('podcast')
+        fg.podcast.itunes_category('Podcasting')
+
+        fg.title(self.infos['title'])
+        fg.description('none')
+        fg.link(href=self.args.podcast_url,rel='self')
+
+        for item in self.infos['entries']:
+            """
+            #infos['entries'] keys
+            id uploader uploader_id uploader_url channel_id channel_url upload_date license creator title alt_title thumbnail description categories tags subtitles automatic_captions duration
+            """
+            fe = fg.add_entry()
+            fe.id(item['id'])
+            fe.title(item['title'])
+            fe.description(item['description'])
+            item_full_path = self.args.podcast_url +'/'+self.infos['title']+'/'+item['title']+'.mp3'
+            fe.enclosure(item_full_path,str(item['duration']),'audio/mpeg')
+
+        fg.rss_str(pretty=True)
+        # create folder of feed if it doesn't exists
+        os.makedirs(self.args.dir+'/'+self.infos['title'], exist_ok=True)
+        fg.rss_file(self.args.dir+'/'+self.infos['title']+'/podcast.xml')
+
+        return True
+
+    def my_hook(self,d):
+        if d['status'] == 'finished':
+            print('Done downloading, now converting ...')
+
+    def yt_download(self,ydl_opts):
+        with youtube_dl.YoutubeDL(ydl_opts) as ydl:
+            print('Downloading Videos...')
+            print('Depending on number of files, it can take a while...')
+            results = ydl.extract_info(self.args.youtube_url, not self.args.simulate)
+            print('Done')
+
+    def create_opts(self,type):
+        if type=='audio':
+            ydl_opts = {
+                'quiet':self.args.quiet,
+                'format': 'bestaudio/best',
+                'ignoreerrors': True,
+                'postprocessors': [{
+                    'key': 'FFmpegExtractAudio',
+                    'preferredcodec': 'mp3',
+                    'preferredquality': '192',
+                }],
+                'progress_hooks': [self.my_hook],
+            }
+        elif type=='video':
+            ydl_opts= {}
+
+
+        # if youtube url  is a list, then download archive 
+        print('Fetching Url properties...')
+        if 'entries' in self.infos:
+            ydl_opts['download_archive']= self.args.dir+'/archive.txt'
+            ydl_opts['outtmpl']= self.args.dir+'/%(playlist_title)s/%(title)s.%(ext)s'
+        else:
+            ydl_opts['download_archive']= self.args.dir+'/archive.txt'
+            ydl_opts['outtmpl']= self.args.dir+'/%(title)s.%(ext)s'
+        print('Done')
+
+        return ydl_opts
+
+    def print_infos(self):
+        print('Downloads folder name: {}'.format(self.args.dir))
+        if 'entries' in self.infos:
+            print('')
+            print('List of episodes online:')
+            for k,i in enumerate(self.infos['entries']):
+                print('Episode {}: {}, Durée:{}'.format(k+1,i['title'],i['duration']))
+
+    def process_args(self):
+        if 'entries' in self.infos:
+            if self.args.feed:
+                print('')
+                print('Feed creation...{}'.format("Done" if self.create_feed() else "Error"))
+            else:
+                print('')
+                print('Warning: no podcast feed has been created, please add --feed argument.')
+        else:
+            if self.args.feed:
+                print('')
+                print('In spite of --feed argument, as you specified contradictory options, no feed can be created!')
+
+        if self.args.simulate:
+            print('Downloads...Not requested!')
+        else:
+            self.yt_download(self.create_opts(type='audio' if not self.args.video else 'video'))
+
+
+
+