Blogger and celebrities are been paid when they are used to promote a token/coin. That means they are doing their jobs. Have once fallen into a scam because it's being promoted by a celebrity, although it isn't a crypto scam. So since then I never believe any blogger nor celebrity to invest. I will rather make my own research to invest.
Those bloggers who are celebrities need to take responsibility if they are not mentioning that this is a sponsored video. In most cases these so called influencers promote the project in such a way that their followers think they are also investing in it. Those influencers also mentioned in their project that they are thinking about holding those projects for the long term when they haven't made any investment in them. Everybody doesn't have the knowledge to invest in crypto project so they follow some influencers they like so if those influencers giving financial suggestion to their community then they should have take the responsibility as well.