This strange test shows that the heatpump makes the id3 drain more energy than without:
All of these YouTube videos are fun, and might even in some cases give a directionally accurate view of some feature of the vehicle, but I'd struggle to take any of them as hard evidence of anything, just because they may not be taking into account procedures necessary to devise and carry out an accurate test.
I unfortunately can't right now work through a 40+ minute video where I need to rely on subtitles to understand much of what's being said, but Chris from Battery Life comes to mind as someone who seems to be a nice guy, is entertaining, and is trying to put out useful content, but is getting the details wrong. At least with some of his videos, the necessary data was provided to be able to make a more accurate calculation, but it's still not anything I'd rely on to draw trends or make decisions.