Certain types of video playback stopped working in Firefox

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Unable to play h264 video in mpv on latest Tumbleweed snapshot

Hello, I have a new issue after updating to the latest snapshot yesterday. Playing video or streaming from certain sites (e.g. Twitch.tv) shows a black screen now. MPV shows a new error message. [ffmpeg/video] libopenh264: Unable to create decoder [vd] Could not open codec. [vd] Decoder init failed for libopenh264 [vd] Failed to initialize a decoder for codec 'h264'. openh264-7 and openh264-8 are installed on my system. I’ve re-installed mpv and openh264 libraries without any change. Factory s…