After being taken hostage following a bank robbery by two bumbling crooks, a fame-obsessed video blogger sees an opportunity to skyrocket her popularity by secretly live-streaming her ordeal with the police hot on their trail.

I like the idea.

Maybe something like:

After being taken hostage in a bank robbery, a fame-obsessed but failing video blogger covertly live-streams her ordeal to boost viewership and gain sponsors.
(24 words)

Whatever, my takeaway advice is to enhance the story by establishing in the setup that her ambition has been frustrated. Her video blog is an abysmal flop, low viewership numbers, no sponsors.

And the opportunity knocks:she’s taken hostage.

Best wishes with this project.