This documentation is not using the current rendering mechanism and is probably outdated. The extension maintainer should switch to the new system. Details on how to use the rendering mechanism can be found here.
Plupload’s chunked upload feature¶
Since version 1.1.0 the chunked upload feature of plupload is officially supported.
See plupload documentation for more information: http://plupload.com/docs/Chunking
It’s recommended not to use too small chunks as each upload operation is expensive regarding performance (DB request, FE user check, etc.).