I may be biased since I never saw Molly's old videos, but I don't have any reason to think she was actually faking an ED considering she had to take time out of uni because of it? Maybe she might have overdramatised how bad it was, but that's not uncommon - a lot of "ED recovery" stuff online is just covert pro-ana content, and a lot of people will exaggerate their condition because they want to be seen as sicker/"better" than other people with eating disorders. Anorexia has a horrible competitive element to it sometimes.
Molly did say somewhere (Instagram I think?) that she took down her old recovery videos because it's a part of her life she wants to leave behind and not be associated with online. That could mean anything - it might be because she's embarrassed by them, associates them with bad memories, or because she regrets promoting unhealthy behaviours. Whatever her reasoning, it was probably a smart decision to get rid of the videos and start afresh, so I can't fault her for it.