cant download sound files

It sounds like you need to talk to the content provider about the errors you're seeing in your browser when you visit their website.

Without knowing the actual text of the "insecure" message, I can't tell you what that's about, but it seems like something they should probably fix.  A lot of groups prioritize work that generates customer complaints, so reaching out isn't a bad plan.

The other thing that's probably happening, is that most major browsers require you to active Flash Player in the browser now.  The idea is that by generating friction for folks like you, they can pressure content providers like your Gaelic class website to move to native HTML5 and JavaScript solutions, which obviate the need for Flash.  Your browser vendor is intentionally making the experience difficult, with the hope that you'll complain to the content provider.

There's more background on that here: https://theblog.adobe.com/adobe-flash-update/

Anyway, here are some instructions on how to active Flash in the major browsers.  We try to keep them updated with each new browser version, but ultimately, that website is going to need to be updated (and soon). 

https://helpx.adobe.com/flash-player.html

https://helpx.adobe.com/in/flash-player/kb/flash-player-issues-windows-10-ie.html please try these steps.

The site in question is the Ulpan Gaelic Website. It has all my course work.