Hey, nice work, Dave!
I think you’re Eamon an Cnoic is quite nice. Echoing what Ausdag writes, the note before the C and the descending notes before the E between :22 and :28 seconds sounds rushed. Otherwise, I like your vibrato and such. One thing you might think about, again as mentioned by Ausdag, is working towards getting a “Piper’s C”. Not sure if it’s considered advanced technique or not.
Regardless, a piper’s C may involve very slightly different cross-fingering than a normal C nat (depends on the chanter); the main difference being that you generally slide into it by slowly and partially uncovering the C# stop. This is probably best done by straightening your top finger like you’re pointing, and adding vibrato with a couple fingers of the bottom hand (whichever ones you like the sound of best). A Piper’s C often involves lifting the chanter as you slide into the note. Before trying it, have a player in mind whose C you like.
If you like a visual, Peter Laban has a picture of Seamus Ennis where you see him pointing his top finger. Go to this page: http://www.uilleannobsession.com/extras_peterlaban.html and look for the photo captioned: “Séamus Ennis around 1981 at an outdoor recital…”
This is probably something further down the line, but once you have that Piper’s C, you can later find a way to extend some of that approach/sound to your 2nd octave G (such as for the short phrase that starts at :11 seconds).
For Sean Bui, I’d suggest letting the long B note (at the end of the parts: B2 c d2) breathe more; it sounds too staccato for me. One thing you might do is keep the chanter open after the C# to help it act as a lead note to back D, but that depends on how you want to voice that part!
I think David Lim has given some good tips too. You might want to vary a little bit of the AFA BGB AFA in Sean Bui with an occasional long roll on the A or B.
Another good variation for the D cran in Sean Bui is to break up the D by playing DAD instead of the cran.
For a new technique, you may want an FGA staccato “triplet.” Keep in mind that only the F and G are actually staccato; the A is played legato. This short clip of Brian McNamara playing Sean Bui will demonstrate both that triplet and the DAD variation:
http://www.prism.net/buile/bmacbui.mp3
Again, I agree with David Lim about keeping your high standards; it sounds like you’re coming along nicely!
RE: recording, have you checked that your inputs are cranked up? If you’re not sure where, double-click the volume control in your task bar. Go to Options → Properties, and click “Recording.” Click OK. These Recording Control sliders will boost your input signal.
I hope these are helpful. And congrats on the nice work.