In the video, I open up a practice transcript from the Proofread Anywhere website. The pdf file opens in another tab.
We tap the share icon in the top-righthand corner of the tab with the transcript and choose "Copy to iAnnotate".
The transcript opens in iAnnotate.
The first thing to do is save the document somewhere. If all went well when you set up iAnnotate initially, you will have a connection to iCloud Drive -- if that's what you chose.
There's a small asterisk next to the file name of the transcript, and that means it has not been saved. So tap the name of the doc and choose "Save to..." Then choose your preferred storage. The asterisk will disappear when the doc has been saved.
I then make a couple of annotations and save them.