My laptop is on Ubuntu 16.04. Via apt, I get libreoffice 5.1.6 from last october. Snap gives me 5.3.1, which is the newest one.
Snap is not there yet. Finding stuff is hard, because uApp Explorer [0] is not good enough yet. It suffers from trying to appeal to servers, desktop, mobile, and IoT (which probably just means Raspberry Pi). It is confusing and messy.
Edit: Since GP mentioned youtube-dl, specifically. A `snap find youtube` gives me three different variants:
youtube-dl-casept 2017.03.26 casept
youtube-dl-snap daily fireeye
youtube-dl-bdmurray 2016.10.16 bdmurray
The first one looks recent. Maybe the second one is even better? As I said, it is confusing so far. We have to figure out how to do curation well.