So I don’t post often to Snapchat, but it is a great tool for creating content. They simply have the best filters!
The way I use it is… open Snapchat, record a video with filters enabled, save locally to your phone, then edit/trim locally, and then share on IG with auto-share to Facebook.
Pro tip: When you record videos, Snapchat will not interrupt the music playing on your phone and therefore incorporate it into your video, as opposed to the video recorder from Apple.