У вашего броузера проблема в совместимости с HTML5
Invision is soon releasing the newest addition to their Craft Plugin for Sketch called “Prototype”. This tool allows you to create screen transitions, access iOS native components, add links, and other cool stuff right on Sketch, without leaving the design flow.
Learn Sketch 3 and UI Animation/Prototyping tools with my course: https://www.udemy.com/ui-animation/?couponCode=CoolioIglesias
Coupon Code (50%): Coolio Iglesias
Resource File of this video: https://www.dropbox.com/s/evnuve129pe18ae/craft-prototype.sketch?dl=0