There is another video about Carmelite spirituality here:
   • Carmelite Spirituality  
A video about St Teresa of Avila is here:
   • St Teresa of Avila: her life and faith  
You can find his writings online here:
https://en.wikisource.org/wiki/Author...
and here
https://www.jesuspassion.com/John_of...
A great book about St John's spirituality is The Impact of God by Father Iain Matthew