video 1:
https://www.youtube.com/watch?v=dwclEpw1xRU&feature=PlayList&p=8063FB0B2C7BD693&playnext_from=PL&index=0&playnext=1
video 2:
https://www.youtube.com/watch?v=N8dwK2m_65U&feature=PlayList&p=8063FB0B2C7BD693&playnext_from=PL&playnext=1&index=1
video 3:
https://www.youtube.com/watch?v=2EvJbYGzRuo&feature=PlayList&p=8063FB0B2C7BD693&playnext_from=PL&playnext=1&index=2
video 4:
https://www.youtube.com/watch?v=3Try2P8v8To&feature=PlayList&p=8063FB0B2C7BD693&playnext_from=PL&index=4&playnext=1
video 5:
https://www.youtube.com/watch?v=UnD_4I7ItsI&feature=PlayList&p=8063FB0B2C7BD693&playnext_from=PL&index=5&playnext=1