Anything but the obvious solution to prevent accusations of lying; accusations due to her admitting she's a liar.
A) Unplug the scale to cancel any tares or other shananigans.
B) Plug it back in - make sure the cell phone with the current DATE is also visible.
C) Step on scale - no jump cuts, nothing hinky; with date still in view. Hint: Rest the turned on phone beside the scale read out.
It's no more complicated than that & I'd be prepared to believe it... AS LONG AS the scale was reset with the date readout on the phone always visible.
Build a reputation as a liar, admit you're a liar; specifically about your weight & it should come as no surprise that no one is simply going to take your word for it.
What happened to barely skimming comments? Suddenly all that toxicity is making you rethink your channel or some such? Here's an easy rethink - accept that for a long time, you're going to have to turn yourself inside out to prove you're not lying. Accept that, intended or not, you treat your viewers like sewage drenched flatworms with the IQ of a mud flat; expecting them to accept instant changes in narrative with no explanations or apologies? You may be choosing to make a career consisting of constant stupid; your viewers, (mostly), have made better choices. You are the sole agent of your own reputation; playing the victim card doesn't work on the Big Kid playground.