That only works with the weaker tiers of DRM which are typically only allowed to stream low resolutions. As mentioned in the OP article, the stronger DRM tiers never make the cleartext visible to software and those are mandatory for high quality streaming.
Not to say the stronger tiers never get broken but it's a lot more involved than just recording them with OBS.
That device makes no mention of stripping HDCP and I can't find any evidence it does that on the maker's website. What makes you think it will strip HDCP?
> I can't find any evidence it does that on the maker's website.
I believe that's intentional (it would be illegal to import if it was advertised).
> What makes you think it will strip HDCP?
I've got 6 in use for lecture/talk recording without worrying about HDCP. Especially useful for presenters casting to chromecast or presenters using macbooks with DRM software (as blackmagic SDI converters don't support HDCP at all)
For example Macs and RedHat systems require HDCP if you've used Spotify or Apple Music since the last reboot (which applies to most speakers).
Some Chromebooks can't provide direct display out but cast to a ChromeCast instead, which also always requires HDCP.
We've also had talks on media and cultural studies which use a clip from e.g. a Netflix or Amazon Prime show as part of their talk. HDCP is almost guaranteed in this case.
If your HDMI chain signals that it can't handle HDCP, some computers will obey that (and downgrade or stop playback). But most broadcast HDMI tech can't even signal that HDCP is unavailable, so you'll get HDCP by default.
That's why every major venue, university or event has HDCP killers stockpiled. For 1080p60 that used to be cheap chinese HDMI splitters, nowadays it's mostly these Hagibis cards. If they're really fancy they'll have an HD Fury with HDCP removal license, but those cost ~$600.
Not to say the stronger tiers never get broken but it's a lot more involved than just recording them with OBS.