I am assigning weight to her arguments here since she based them on personal experience and interactions - travel to Afghanistan and interaction with the 'players' involved, and her interactions at the Indian consulates.
If she had said, 'I believe', without the reference to her personal experience/research in arriving at the conclusions she did, I would have been more skeptical.
Obviously hers is not the final word, but it does support the arguments made by Pakistan on this issue, and she isn't a Pakistani.
If however you were merely baiting me to throw the video you posted earlier in my face, let me point out that towards the end she clarified that there was no evidence linking the Pakistani establishment with the Mumbai attacks.