queuing multiple encodings with different edits
The way I would do it is just duplicating my timeline, make one for each type of encoding I want (clip_001_youtube, clip_001_instagram,...), then use Media Encoder, just publish them all and then let ME do it's thing of batching them.
I find it helpful to make a bunch of timelines that are almost the same. Sometimes, I use nesting to make it easier also.