When you move strips up and down channels, it'd be useful sometimes to be able to replace existing footage in another channel instead of moving up 2 channels.
To be careful with:
What if you have a gamma cross effect in the target channel that overlaps one of the cuts of the selection you're moving up?
Use the split selection blocks function to merge parts of the selection that are disconnected in time
When you move strips up and down channels, it'd be useful sometimes to be able to replace existing footage in another channel instead of moving up 2 channels.
To be careful with: