Awesome app. It is somehow not listed on android-foss list so maybe someone didn’t know about it.
Obtainium allows you to install and update Open-Source Apps directly from their releases pages, and receive notifications when new releases are made available.
GitHub page: Link.
I don’t even know why that video is there. At first glance, you might think it’s a video explaining how Obtainium works. But it’s actually a video about how to manually set up an RSS feed of the apps you use from GitHub. This video is just what had inspired the developer to make Obtainium.