I very highly doubt Linus is knowledgeable enough on his own to test speakers at the time of this writing. He could hire a specialist, but I'd still be skeptical he could do as good a job as Amir. LTT has had some sketchy videos in the past in terms of substance and they spent most of their effort on production value and entertainment (compared to Gamer's Nexus or Hardware Unboxed). I unsubbed because I found the channel to be unhelpful for my needs. I remember he did a delidding video of 6700k using only thermal paste under the IHS, and he did a video on 'does ram matter?' with Crysis 3 at regular gaming resolutions. It was bizarre, and even though it wasted my time and everyone else who watched it, it also made me wonder why he bothered wasting his own time that way. And then after his weekly tech show kept being late and having audio issues for too many times, I just quit the channel altogether. It's not a useless channel for info, but it's not my go-to source.
That is the way of the world though: Entertainment is what's most profitable. People want to see crazy gazillion monitor gaming setups or OMG the most EXPENSIVE headphone/random electronic thing here. (If you enjoy his entertainment that's fine, what annoys me is when people act like LTT is the go-to channel for in-depth accurate info that never misses.)
Most of the time gaming hardware guys talk about audio it makes me cringe because they'll make fun of people who believe in magic cables in one sentence and praise this amazing amp that really expands the soundstage of their headphones in the next. A good example of this is PC Perspective. The idea that magic amps or dacs can 'improve soundstage' or whatever is still the mainstream opinion as far as I can tell in these circles.
Having said that LTT did do the HDMI cable testing last time and that used objective, measured data. I just hope they don't do a video making fun of audiophile cables where they spend an ungodly amount on them (theatrics) rather than testing Displayport cables (where there are legit cable QC issues). If I'm wrong about LTT and this is actually the start of a good impressive change, I'm more than happy to be wrong and it would be awesome if more people can be exposed to audio science rather than audio BS. As far as I can tell in the casual gaming community, BS is winning.