text: Susan: <file_other>
  Susan: Look what I found. Check it out, I think it's worth it and that you may be interested. 
  Mark: OK, thx.
  Mark: But what is it? More or less.
  Susan: I found this guy on yt.
  Susan: It's about motivation, being efficient and things like that. 
  Susan: We talked about it, you remember?
  Mark: yep. I get it.
  Mark: Thank you. I'll have a look later.
  Mark: You were right, he's good!
  Mark: many of the mechanisms sound familiar to me...
  Susan: :)
  Susan: I thought it might be useful :)
  Mark: Yes, it is.
  Mark: He does explain a lot of things. 
  Mark: And I've checked some other videos. There's a lot of interesting stuff.
  Susan: Which ones do you like?
  Mark: <file_other>
  Mark: <file_other>
  Mark: And this one, but it's a longer one and I didn't have time to finish it yet. But it seems worthwhile. 
  Susan: I've seen the first and the last one. 
  Susan: Yes, I think it's worth watching.
  Susan: Haven't seen the 2nd, but was planning to watch it as well :) 
target: Susan sent Mark a motivational speaker's clip. Mark watched it. He liked it. He followef up watching another videos of the speaker. Susan will watch some as well.