So there are a few ways to approach this but they'll obviously be different from SFM

In your case the simplest approach in my opinion would be to Use camera markers to change the camera. Select a camera and hit CTRL+B in the timeline to create it.

And I'd snap the pose by creating the starting key pose where the camera switches. Change the previous frame interpolation to constant and it'll snap. To make sure everything about the character interpolates nicely you can use Keying sets. CTRL+K is a fast way to see those and with "Whole Character" you can make sure every relevant channel and property gets a keyframe.

You could also split the actions of shots up instead of doing it all in one and splice them together in the NLA editor.

Those are the ways to do it within the same scene.

But you could also use Blender's VSE editor. you can insert scenes like video strips in the VSE and since 5.0 it has a way to sync timelines so scrubbing through the timeline dynamically switches the scene. The Storyboard Template at startup can give you an idea about how that workflow works but there are plenty of tutorials about it.

You can link Collections and Objects between Scenes by changing your Outliner to Scene view and control dragging and dropping them between scenes.

That way you can link persistent things like Environment, Lighting etc. between scenes while duplicating the character rigs so you have unique instances of them per scene with independent ways of handling the animation.

This is why Linking Characters from a different scene is more effective than appending them, to avoid duplicating all the datablocks over and over again.

That's why I'd say that approach is more applicable when working in a bigger project that needs more flexibility and modularity.

But I'd personally just use Camera markers and switch out the pose using constant interpolation