Facebook
app is going to release a new features i.e.  video profile on facebook but
there’s already a jailbreak tweak called FBVP Enabler, that allows you to make
a video as your  facebook profile.
This
tweak is available in cydia via BigBoss Repo for free. You can configure
options from settings.
Here’s
how to do it..

First
you need to be jailbroken.  If you’re not yet jailbroken ….Click here to jailbreak iOS 8.4

Step 1: Go to Cydia

Step 2: Search for FBVP Enabler & Install
it..
After installing, respring your
device
Step 3: Now go to Settings & Scroll
down to FBVP Enabler tweak

Step 4: Enable it & Respring
Step 5: Now Go to Facebook App
Tap on your profile picture

A Pop up message will appear and
choose a option for video.
Note: Video should be only less
than 10 sec.
That’s it.

Enjoy