Hello,
I'm not exactly sure what may be happening on your end, but here are my test results: PowerPac v14.023.x and Windows 10
- Created a single page tbk with both a video and audio file loading on load page. Auto play is off in both cases for sake of experiment.
- With Flash enabled, both files play as expected in all browsers. IE11 uses HTML5 for the mp4 video and Flash for the mp3.
- With Flash disabled using your method described above, both files play using HTML5 in all browsers.
- With Flash enabled and allowFlashFallback = "auto"
Both files play in IE11, however, the mp4 video will play using HTML5, which is preferred in "auto" mode. The mp3 audio plays using Flash.
These test results seem to reflect the intended design of these functions given various scenarios.
If you provide a non-working example with the media files, I would take a look and see if I can reproduce what you are seeing.
For what it is worth, it may be that a corrupted Flash installation is giving trouble on your end.
On another note, please use the PowerPac server to confirm your findings. Browser and Flash updates are making more and more difficult to play media from the hard drive directly. That is one of the reasons why we have provided this developer feature for testing content.