I would propose a second channel in the deb repo for the beta releases, which seem to be fairly stable anyway.
So in addition to deb [arch=amd64] https://get.filebot.net/deb/ stable main
there'd also be deb [arch=amd64] https://get.filebot.net/deb/ beta main
Beta version of deb/rpm repositories
Beta version of deb/rpm repositories
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