a way to casually view scenes in studio
My apologies, I cant understand your question.
Just load the scene in the studio and you are done.
can you only edit other peoples scenes
If you have the scene data, you have all the power to edit it whether it's other people's scene or yours.
Just make sure you know what you are doing.
No.
how do you get them to play?
There are some ways.
1. Gimmick
2. VNGE
3. Timeline (Im not using this so I dont know how to make one)
You should be able to play the Gimmick scene if you have the latest version of BR studio modpack.
It should be played automatically when you loaded the scene.
You can control the speed in the Animation menu on the top left.
VNGE
VNGE is included in the BR, but not installed. Just search it up.
If the scene contains VNGE's scene, you should find a dialog box saying the scene you loaded contains VNGE data and give you some options.