You only need to publish your changes to your users, if you are the only the user you don’t have to publish anything.
Not sure if adoption by businesses is really wanted? Unless their goal is aligned with our cause but from profit seeking perspective I don’t see how. But you are welcome to change my mind.
This is expected atm, it is a webm video. Which isn’t supported yet. Videos in general still need to be supported in Jerboa. But in the next update you will be to see first frame of the video (In the comments). (Ain’t much but its better than nothing atm)