Quick Look: Rumble is the on-demand version of the Rumble TV Roku channel, with various categories of YouTube-style videos from Rumble TV, a Glasgow-based video production company. The Roku videos are loosely categorized, with most involving kids and animals. Contrary to the developers description, there is nowhere near 130,000 videos - take away the last 3 zeros and you will be a little closer to the actual amount. Rumble TV has a YouTube channel called Rumble Viral, which seems to offer a larger library of videos.
Below is one of the videos currently available on their YouTube channel.
-- Information is current as of March 22, 2019
Roku Channel Store Description: A video sharing platform that features over 130,000 different creators and channels of content. The platform has a strong emphasis on news and viral videos.
CHANNEL STORE CATEGORY: Web Video
DEVELOPER: Rumble Inc.