You would have to call
.then on that promise, and in the passed function call
dispatch to store the actual stream in the DB.
Also, you should rewrite your
- Don't call
dispatch at the top level of the rendering function (via
start-stream in this case): https://day8.github.io/re-frame/FAQs/LoadOnMount/
- It's likely that you want to use
 instead of
> if I shouldn’t manipulate srcObject with reagent
I think lilactown meant exactly the opposite - you should do it with Reagent, when it makes sense.
Use re-frame for everything that you yourself consider your app's state. Whether "video stream from a web cam that should be displayed in a
<video> tag" is part of your app's state or not - up to you. And of course, sometimes such an ideal still breaks because of how some JS APIs are written - in that case, use whatever's feasible.