Im 2 years too late as my first video was in 2007.. But there is no proof of it today as I cleaned my channel up to become a focused automotive channel.
My first video was of my fish tank. Showing off my lemon barbs in 2007. After deleting some junk - my now the oldest vid is 2012 only.
lol, I thought that top thumbnail (see what I did there?) was a way of saying "doing YouTube in 2008 was like pulling your nails out." - But then I checked out your channel, sorted by date and saw it on your channel (but I was too scared to click) ^^
Congrats on 10+ years (12 total I think?) of making Youtube videos. That's quite the achievement and it goes to show that hard work and lots of discipline does bring results.