Got a long flight and looking for some technical youtube talks or lectures to download. 

Ideally on new developments in the following areas: 

- Ethereum
- Cryptography 
- Distributed Systems
- Machine learning

not on your list, but i watched this lately and really enjoyed it: https://www.youtube.com/watch?v=HB5TrK7A4pI

Here is a good dist sys one too:

Technowatermelon. Elder Millenial. Building Farcaster. 

nf.td/varun

not on your list, but i watched this lately and really enjoyed it: https://www.youtube.com/watch?v=HB5TrK7A4pI

Here is a good dist sys one too: https://www.youtube.com/watch?v=cNICGEwmXLU