Steve all ready mentioned this,
by stevepusser » If you want something similar, maybe even better, try uget from the repository. It also uses aria2 as the downloader.
And I agree, it would be better to use "uget"
https://packages.debian.org/stretch/uget
Then you can use "synaptic package manager", to install it.
Or, better :
Unless you have a good reason to prefer or want this, Persepolis download manager, personally I think Uget is better, and it will be supported, with security updates , etc.
From :
https://wiki.debian.org/DontBreakDebian
One of the primary advantages of Debian is its central repository with thousands of software packages. If you're coming to Debian from another operating system, you might be used to installing software that you find on random websites. On Debian installing software from random websites is a bad habit. It's always better to use software from the official Debian repositories if at all possible. The packages in the Debian repositories are known to work well and install properly. Only using software from the Debian repositories is also much safer than installing from random websites which could bundle malware and other security risks.
It is not just the Ubuntu PPA's, anything from any where else is really a last resort, like when there is no package available in the Debian Repositories.
All though Git hub is known to be reliable ,etc. it still is not a Debian Repository, and "uget" is a better option. (In my opinion)