def Search(self):
    query = urllib.quote(self.search.get())
    url = "https://www.youtube.com/results?search_query=" + query
    response = urllib2.urlopen(url)
    html = response.read()
    soup = BeautifulSoup(html, "html.parser")
    for vid in soup.findAll(attrs={'class': 'yt-uix-tile-link'}):
        self.tree.insert('', 'end', text=vid['title'], values=(vid['href']))

self.tree.bind("<Button-3>", self.OnDoubleClick)
self.menu = Menu(self, tearoff=0)
self.menu.add_command(label="Add to List", command=self.PassLink)

def OnDoubleClick(self,event):
    self.menu.post(event.x_root, event.y_root)

def PassLink(self):
    item = self.tree.focus()
    str = self.tree.item(item, "values")
    print str

if self.toplevel==None:
    self.toplevel = tk.Toplevel(self)
    self.toplevel.geometry('700x500')
    self.tree = ttk.Treeview(self.toplevel, columns=('Link'),height=17)
    self.tree.heading('#0', text='Title')
    self.tree.heading('#1', text='Link')

    self.tree.column('#1', stretch=YES, width=300)

    self.tree.column('#0', stretch=YES, width=500)
    self.tree.grid(row=0, column=0)

    self.tree.insert('', 'end', text=str, values=(str))
    self.toplevel.update()
    self.toplevel.protocol('WM_DELETE_WINDOW', self.removewindow)

else:
    self.tree.insert('', 'end', text=str, values=(str))

def removewindow(self):
    self.toplevel.destroy()
    self.toplevel = None