thank you for the request.
Certainly I think it would be useful to be able to render in the viewport.
However, I tried to implement it, but I couldn’t implement it.
(If I change render.render () used in the add-on to render.opengl (), saving is repeated for some reason …)
I consider temporarily disabling automatic keyframes.
Append:
I’ve tested this and I’m not sure what the problem is when auto-key is enabled.
When loading an angle in a camera list item, no new keyframes are added, even when auto-key is enabled.
Also, if the camera has keyframes and you load a list item while playing an animation, the keyframes are not inserted and the angle cannot be changed.
If you want to see the angle of the list item while the animation is playing, you will need to remove the camera keyframe.