ultimately nothing is really representative. different people like different things. and not everyone bothers to watch eurovision or then bothers to vote.
but jury is a very limited sample size, and televote does feel awkward because votes cost money which means that rich people get an advantage over poor people in votes.
youtube is the most neutral in this regard. it's a huge sample size (basically entire western world, ignoring countries where it's blocked e.g. china), viewing and upvoting costs nothing and is zero commitment, and most likely if people like a song they will keep re-listening to it and sending it to their friends, which makes the number go up, whereas if a song is "meh" they won't do it and the numbers stay low.
so yes, this is not perfect, but I think it's an interesting data point to look at. realistically, the songs people actually wanted to listen to over and over again, are the ones at the top of this list.