The clipboard is the last resort when I build my actions because they leave a footprint. Unless you do a couple of extra steps to maintain a clipboard history, the value that runs through your apps will remain there and push the previous one into nothingness.
Some apps don’t give you a choice though and all you want is to access the iOS sharesheet. A Youtube video? A Vine short? An Instagram photo? None will let you access the built-in sharesheet and trigger extensions and your only alternative is to copy a link to the clipboard.
You possibly stumbled upon Workflow actions to download content from those sites. Here's one to download Youtube videos:
Here’s another one by tomf64 to download Vine videos. This version was modified slightly to fix some quirks.
And the last one we’ll work with downloads images and videos from Instagram. I couldn’t find one I could give proper credit to the creator, so I built one myself.
This action will list your workflows and run the one you choose with the clipboard as input. It only works for text in the clipboard and has the downside of opening Workflow when you run it from the Today Widget. That happens because it triggers the selected action using Workflow’s URL scheme.
I admit, this is only a workaround until the DeskConnect team figures out a way to call workflows within workflows so we can build modular actions. Would be like having x-callback-url built within Workflow and across its workflows. Until then, whenever I need to download a video or photo from one of the services I listed, I copy the link and pull down the Today Widget to run the action I need. It’s not great but gets the job done.
You can modify all of them to check the clipboard in case the input is invalid, but then you’d need to verify all your actions. ↩