A common tell that still exists is when hands are moving fast, they blur and distort in ways that do not look like normal motion blur and sometimes even do weird sudden twists. Helps to go look at some videos of real people and focus on the hands to compare and learn what the blurring should look like. (details should remain consistent, just stretched and fading along the motion, not congealed into one big blob like often happens here)
But yeah most of the time now you have to cross-reference details between different posts to catch it =/
