These videos are all about Java 9 from the Devoxx conference:

• Keynote by Mark Reinhold
  https://www.youtube.com/watch?v=l1s7R85GF1A
  
• Introduction to Modular Development by Mark Reinhold/Alan Bateman
  https://www.youtube.com/watch?v=qr4O4SbzihQ
  
• Prepare for JDK 9! by Mark Reinhold/Alan Bateman
  https://www.youtube.com/watch?v=KZfbRuvv5qc
  
• Modular Development with JDK 9 by Mark Reinhold/Alan Bateman
  https://www.youtube.com/watch?v=V6ycn1-QQV0
  
• Advanced Modular Development by Mark Reinhold/Alan Bateman
  https://www.youtube.com/watch?v=SU1WFX8yeKM
  
• Project Jigsaw: Under the Hood by Mark Reinhold/Alan Bateman
  https://www.youtube.com/watch?v=UKC0uC7QUkI
  
• Ask the JDK Architects
  https://www.youtube.com/watch?v=7vvx505mu3s
  
• Form now all Devoxx sessions are freely available on Youtube at D+1
  https://www.youtube.com/channel/UCCBVCTuk6uJrN3iFV_3vurg

Thanks to Arnaud Héritier for gathering these links for the Maven dev mailing list.