I rewatched this last night:

https://m.youtube.com/watch?v=EyMma6VGPJg

She echoes Barry Awe in terms of Pentecost's timing, Tisha B Av.

There is very good info in the video and it was a benefit for me to see it again.

Over the years I have listened to Barry Awe and have also benefited a great deal from his teachings.  His current focus is also on Tisha B Av.

In terms of his (and the person in the video) timing in tying Pentecost exactly to the very timing of Tisha B Av, I sincerely do not believe this is correct.  I see a small gap in time between the two, and is why I wonder if we might experience a type of three days of darkness between July 19 (one option for Pentecost) and the beginning of Tisha B Av (July 22/23).  

When I read Psalm 18, I wonder if it may have application to us waiting on Him during the three days of darkness (see vs 11).  I wonder if God will indeed come down for us on true Pentecost, yet we might actually end up being taken on Tisha B Av.

I am not adamant on that.  I am just keeping possibilities in front of me.