This is absolutely all I could get, and some of it will be wrong. I couldn't find the second part quoted in the video, with all the expletives. I think that must be on another page.
First five lines of letter, in my opinion:
FROM (typed, and name that follows whited out.)
Jennifer Chessy, Mendy, Don are
some of Brittney's family members the girl has said
to them, x 4 more have helped them.
She's naming us all four likely tomorrow.
Just think of all they want her to tell.
*** says that Brittney wrote a letter with
a lot of evidence pertaining to Jennifer, her,
you, Mendy and *** , asking if anything
happened to her go and give it to the police.
But **** is scared to give the letter up.
I want it sorted out before you go
?? ?? or going to the girl in hostel.
?? ??send baby and daughter to police
?? Brittney, but she refused to get herself
?? now girl says she's away in Mississippi
?? ??safety, go see attorney.
?? .. and he is doing it for the baby.