You’re welcome. Although not sure if that has to cost you in the form of new microphone. The clarity is good, I can hear you, so that already is much better than many other youtube “tutorials”.
I don’t know your setup or if you do audio processing before adding it to the video, and I’m no expert about this stuff, but thought I list a few things that come to mind in case it somehow helps you or someone else:
Recording levels should never peak. The rudimentary eq display in microphone settings should be enough to check that. Peaks would cause clipping and there aren’t any in the tutorial videos so far. Getting the levels across videos could be good enough by adding a reference audio clip in the editor you’re using and just listening to both with headphones. An eq display or a waveform would give a number but it doesn’t have to be that precise.
The microphone you have now might be cancelling noise and/or echo automatically, you might be further away from the mic in different situations, which might explain the difference. Curtains closed, a blanket behind you and a couple of high-tech noise cancellation pillow-2000’s around the mic might do some good if you’re recording in an echoing/noisy room. Improvised soundproofing without actually building diy stuff, or paying big penny for professional gear, which might not even help
Identifying where the echo comes from and has to be blocked depends on the room you’re in, where the mic is in that room, and which directions the mic itself pics up sound. It does improve sound quality and there probably is a no cost solution to it.
Some use a walk in closet as a sound booth and that seems to work well. But using that might give you remarks from others about being closeted, or finally coming out of the closet. Those could be answered with a death stare and telling how fabulous Blender is https://i.giphy.com/media/s2qXK8wAvkHTO/200.gif