I really don’t get the message and purpose of new “video logs”,
what are we supposed to learn from them ,and if learning is not their purpose,
they are not really got teasers neither.
They are just snippets of the campaign to tease us not really there to tell us anything new.
Master Chief is fighting a bigger threat and is making sacrifices along the way (possibly civilian deaths).
Locke believes Master Chief is simply causing havok and is a traitor that must be stopped, but he doesn’t know of the greater threat or why he is doing this.
Look at their visors at the end. In their reflections are who they think the enemy is.