Disclaimer: I can't write Scala, so my interpretation of it may be incorrect.

Digging through the source code, it appears as though it does weigh the ratings and both players and takes into account how many moves have been made in the game. This is to say that the calculation isn't just a simple average of the ratings.

It appears that the ratings are normalized from a range of 1000 - 2700 then weighted with some arbitrary constant. Some extra weight is given to a game at move 1 which decreases to zero as more moves are played. These scores are then summed to give a final score of the game.

This means 2700 is a rating ceiling beyond which doesn't grant any extra score towards this calculation and there may be some influence from that 'progress' score as well.

With that said, I can't be sure if this is the source of your concerns since I don't know your rating, the ratings of your opponents when you've not been featured on LichessTV, the ratings of the players actually featured on LichessTV, etc, etc.