2) A video worthy of being uploaded to YouTube.
3) A video that can be found on YouTube.
2) Son: "Technically most videos are, dad, but while it's YouTubeable, it's not exactly YouTubeable, nawmsayin'?
3) Mother: "What is this YouTube you speak of? Can I watch my favorite old episodes of Falcon Crest on this amazing new service?"
Son: "Uh... You can look for that, mom, but by and large I think that show is just too old to be YouTubeable."
Tina: Stop recording so long or the video won't be youtubeable!!!