With larger videos it is best to use the embed code. In the squeezefunnel builder drag Video from the modules and drop it where you want the video to show in your page.
From the pop-up form that appears select "Embed" for the Video Type then paste the embed code of your video in the "Video Embed Code" field then hit Save button.
To set your video to autoplay just add "autoplay=1;" (without the " ") after your the video link in the embed code. See example below of a video embed code set to autoplay