Her comments today about deleting Qanon videos are getting most of the attention, but I think her more "noteworthy" statement is that she'll delete Trump's videos on YT if [when] he declares his win on election night (unless such win has been "independently certified by reliable [fake] news sources").
They know they've lost this election at the ballot box. So they want to inject as much doubt [delay] as possible in the results by focusing on the millions of uncounted (un-countable) mail-in ballots. They just want time to come up some other strategy.
Public awareness of certain events prevents occurrence.