I believe the problem is the length of your clip. 90 seconds is a long time in terms of both new media such as viral clips and the land of the animated gif as well but surprisingly also in traditional media where TV news segments are only 1 minute 10 seconds long.
I’ve been trying to explain this to content promoters for a while, if the news can sum up a story in 70 seconds, why do you think you need 300?