5 million Instagram videos were uploaded in the first 24 hours

"Instagram Video turned out to be quite popular, with users uploading as many as 5 million videos within the first 24 hours of the feature's launch.
Facebook owns Instagram, which until now was a photo-sharing app. Twitter owns Vine, which allows users to share short videos. Facebook and Twitter are always competing with each other, and Facebook just launched Instagram Video to challenge Twitter's Vine."
Source:  Mobile&Apps, 22nd June 2013