I think what worries him or what worries us in fact is that russell happens to be looking at this in the night for a long time and it coincides with what he saw in the video. And russell is very confident that what he is seeing isn't Jupiter as he knew it.
An analogy example: 'we can distinguish an apple from an orange, if u give me an apple and tell me it's an orange I definitely won't buy that story'
I believe what Russell is trying to say is something like this. He has his doubts that it was Jupiter he was seeing as he knew Jupiter ain't looking like this until he saw the video and voila! That was what exactly he has been looking at and tracking in the night.
So this kind of definition from Russell worries us apart from the video being a hoax.
I hope I did explain this correctly.
;)