App crashes when trying to hit send before video finishes processing

[isaiahtaylorhh]

Steps to recreate:

• tap + and "video from camera"
• record a video
• select "use video"
• while the video still has the "loading" gif on top of it, hit send

App crashes. I assume this would also happen for photos if your internet was slow.

Thanks for this integration, as I've said it's the reason we're using Stream. Excited to see how it evolves.