Hi there Odhran,
This is Ryan from Office Online product team.
Please allow me to try to clarify your situation first then provide some comments.
1. Your PPT file is stored in your own storage (a folder on your Wordpress web site, or somewhere similar), correct?
2. You are using
View-Office-Documents-Online to generate an embedded View of the aforementioned PPT file, correct?
3. You are embedding that View onto your Wordpress web page, and have trouble viewing a 20M file, correct?
If all of the 3 above are correct understanding, then unfortunately you are hitting the same 10M cap as seen earlier on this thread. The cap is detailed in this
help article, and I am pasting the relevant section below.
The document is too large. Word and PowerPoint documents must be less than 10 megabytes; Excel must be less than five megabytes.
Else, if any of the situation was misunderstood, please kindly help us understanding them better and we would be more than happy to provide more assistance.
Thank you!
- Ryan