Flash File (.swf) Not Playing In Multimedia Macro Due To Taking Too Long To Load

Summary

Flash files in (.swf) are not playing in the multimedia macro even though it is supported.
See: Multimedia Macro

Environment

Currently occurring on Confluence 5.9.1-OD-62-023 in Firefox 39.0.3, Safari Version 8.0.7 (10600.7.12) and Chrome Version 44.0.2403.130

Steps to Reproduce

1. Create a Confluence Page
2. Upload Flash File (.swf)
3. Use the Multimedia Macro with the flash file (.swf)

Expected Results

The file should play even without autoplay configured

Actual Results

Without autoplay selected

batch.js?jquery.external=true&atlassian.aui.raphael.disabled=true&locale=en-GB&build-number=6138:259 unable to auto size flash - took too long to load

Notes

Playing the file in Chrome, Firefox, or Safari in another tab renders the flash file correctly so its not the file that is corrupt

Workaround

There is currently no workaround