I'll start by saying that I wasn't involved in this and didn't know it was happening.
I do know that we've been trying to consolidate a number of, um, "lightly-managed" YouTube channels into the corporate channel. It looks like all of the videos from the wireless/spec an channel were moved into this channel (171 videos by my count).
The goal is to have these videos available for people to link to or to be found through searches, not as much to trickle out new content. It's not ideal, but I imagine it's better to not trickle out content that's already been posted and may have varying levels of relevance for subscribers.
Now for the mostly-shameless plug, we have new content every other Tuesday on the Keysight Oscilloscopes YouTube channel
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https://www.youtube.com/user/KeysightOscilloscope