If you are not able to upload a video on Instagram then for sure you have to convert it in some relevant format and when during video convert then keep in mind that video size should be small because if that will big then Instagram will not permit you to upload it.
If you have any idea for upload video then grate otherwise you can use Dumpmedia Video Converter to convert video, the help of this video converter you can directly convert video files according to social media size and format. So you have to install Dumpmedia Video Converter in your computer and then follow these few steps. That will help you for sure.
Well it seems your commercial spam for your dump software is a bit premature, as it is not available for PC. And by the way, when I click on ANY SUPPORT TAB for your site, it does nothing, which leads me to believe that there will NO SUPPORT for this hack software!!!!
I would be cautious of this DUMP software looking at the maturity of the SPAM, and of the wordpress website!