I have been going through clips individually in my timeline and using the Auto feature to apply basic color correction, however it does nothing for a few clips. I've tried nesting said clips, which then causes the Auto feature to work when I apply it again.
Any idea what might be happening here?
And is there a way to apply this basic auto color correction to multiple clips?
The Auto Color correction makes light changes in the clip, according to your screenshot you are not applied Auto color correction try to reset and applied again and make sure your playhead is on the clip you selected to apply this way you can view whether changes happen or not.
Yes, you can apply the Auto color effect to multiple clips.
Once you apply the Auto color correction to one clip select that clip and go to Effect Control Panel select Lumetric Color effect copy using the keyboard or right-click.
Select all clips in Timeline and paste. Auto color correction applies to all clips in Timeline.