First let me say: great playing, I really enjoyed the Irish tunes.
Second, my Concert sounded much better (or at least I thought so) with Zyex strings on it, but you might want to check as to what others like for fiddle playing as I think most fiddle players tend to go for the steel cores. Strings really do make a difference. Of course the fiddle itself will sound better and better on its own when it's been played a while.
Third, I thought the Samsung was the best sound and video quality. However, you might want to ask @KindaScratchy about her setup, which seems to be top notch. I've got a pretty good recording setup, but I don't do video, so I can't be of much help along those lines, beyond telling you which one of your setups sounds best to me.
A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. ~Herm Albright
I heard two clicks on the first video, one at 23 and one towards the end.
I heard a bunch of clicks towards the end of second video (beginning at 1:25) and water running sound after you finish playing, and like Diane said, there were some trailing.
the third one has a machine churning sound, and at the very beginning, there were the static sound (white noise?) The third one sounds the loudest but you may need a better sound proof room to do the recording.
I used earphone to listen to them. Although the third video sound the loudest, I like the sound in second one the best. I think the loudness in the third make your violin sound bright and harsh.
p.s. I think the first video only has 1/3 of the volume of the third and half of the second, and the second has 3/5 of the third. I used full volume the first time on one ear and half volume on both ears the second time, and I could not stand the third video over 50% of my mic.
Great playing! I am in a fiddle class, and my problems are I can't play fast, I can't memorize the music, and I can't handle the repetitions! I guessed I should stay in moderate speed (60bpm to 100bpm) classical without repeats or rondo.