Downloading "repacks" from unofficial sources is risky. These files can be injected with malware, adware, or spyware that targets the vulnerabilities of older Android versions which no longer receive security patches.
As for the team, they're still hard at work, continually improving and expanding Snaptube. They've even open-sourced part of the app's code, allowing the community to contribute and help shape the app's future. snaptube para android 422 java repack