Figure 8.20 - MetaStrip
If you select a MetaStrip and press the TAB key, you will be able to edit
that group's contents. You can break a MetaStrip with the CTRL+ALT+G
keys.
8.5.2 Exporting video
Once you add any content to the Video Sequencer Editor, any rendering
from Blender will output your video sequence contents even if you go
back to the 3D Viewport and add more content to the original animation.
By pressing CTRL+F12, you only see the results of your video editing
project.