One the videos they claim as proof -

but it isn't

because this the original check to discard any obvious 'spoiled papers' and open ballot papers to have them flat for counting - YES Dundee even had to come on Twitter & Facebook to tell their supporters it was not fraud, during the actual count

more 'proof'

another video shows election workers feeding (through a slot) a large  clear bin with sheets of paper - - this was supposed to be ballots, trouble is, it was the A4 sized sheets that had all the names of the voters roll, the ones at the polling station that they check your name and address on - these must be saved for future reference