Instagram chases YouTube with a push for longer, widescreen videos

Move over, YouTube. Instagram is testing 90-minute videos, and Aussie brands are already plotting how to cash in.

Instagram is announcing a big push into longform horizontal video, which the platform is calling "Features." Instagram boss Adam Mosseri has been against doing longform video on the platform "for a long time," he says in a six-and-a-half-minute video (here's the widescreen…