I am sure they have attempted the answers.. and have tried to google for it but with this considering it's a little hard to google actual videos to identify the signs well... This clue 4 looks pretty challenging so I don't blame them for asking in deaf or interpreter spaces if anyone can assist them.
And believe me.. in all the years I've worked on riddles, I've worked with others, googled and looked up answers and I have also seen people pretty much outright give the answers/'spoilers' and they saw nothing wrong with it (I did- it ruins the riddles for others when they accidentally find the actual answer on google- done that lol). But there are times when something so stumps you- you sit on a clue or level for 3 months and just want the stinkin' answer to move on...