Please use media.ccc.de instead of YouTube: https://media.ccc.de/v/34c3-9196-may_contain_dtraces_of_freebsd
Why? Note: That’s the official channel, not some third party rip.
Because it’s not youtube. Some people prefer not being tracked.
I just wanted to add that this is not just about FreeBSD. Most of the things mentioned applies to all operating systems where dtrace is available.