Huh… that is pretty strange… Unfortunately the Handy is pretty locked down so there isn’t much I can recommend in terms of troubleshooting. Pretty much the only thing I can suggest at this point is to try creating a new key from the Handy Connect app. I had an issue where my Handy was working just fine but after a couple days of not using it, I couldn’t get any device to connect even though it had the slow pulsing purple lights. Creating a new key fixed the issue 
If you’re able to get your laptop connected, there is a thread here going over all sorts of different ways you can download videos
https://discuss.eroscripts.com/t/how-to-download-video-audio-from-anywhere/13445
The options labeled NO INSTALL are just websites you can go to. They’re pretty self explanatory, go to one of those websites, copy and paste the link to the video you want to download, and then click the download button that appears.
As mentioned in that thread I linked above, those NO INSTALL websites will only get you so far and you’ll probably end up, at some point, on a site that doesn’t work with the video you’re trying to download. At that point you’ll need to use youtube-dl or jdownloader (I use both)
Here’s a video on how those sites work and how to use/setup youtube-dl. Sorry if i sound weird, I was falling asleep at my keyboard while recording. Also I was trying to post it on YouTube but theres porn in there so they won’t let me post it so it’s just a link to the video on Google Drive lol
Heres the “code” I used to make the youtube-dl shortcut
@echo off
set /p LINK="Enter link to download: "
youtube-dl %LINK%