This is a video from a funky auto-voice YT channel "wikipolitics" but it makes some very interesting points.
Feinstein released the 8 hours of testimony from Glenn Simpson BEFORE the committee was finished getting other witness testimony. This means – the witnesses to come can check their stories against it.
In Simpsons testimony, his lawyer Lovey (?) states that Simpson cannot answer
because someone had already been killed because of the release of the dossier
There is more in the video.
jan 13, 2017 video
Feinstein released Glenn Simpson testimony, from august 2016 allowing future witnesses to get their story straight
https:// www.youtube. com/watch?v=Le2j8WvNaI0
from this playlist of interesting videos
https:// www.youtube. com/watch?v=Le2j8WvNaI0&list=PL9gheDcCxp39OBjMPzhL9rqS9VC8PzhTh