The buffered size of the media source is controlled by `media.mediasource.eviction_threshold.video` and `media.mediasource.eviction_threshold.audio`, not `network.http.http3.recvBufferSize`.
Bug 1903000 Comment 5 Edit History
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The buffered size of the media source is controlled by `media.mediasource.eviction_threshold.video` and `media.mediasource.eviction_threshold.audio`, not `network.http.http3.recvBufferSize`. For Youtube buffering issue, it will be solved by bug 1878510.