We don't need TV / Radio personalities starting to make medical diagnosis based upon video they've watched. If he does have dementia, that's indeed sad... but it goes to illustrate even more what a complete farce this was.
This "dossier" was used to spy on a Presidential campaign by the other party and then used in an attempt to bring him down because you were upset by the election results.
This investigation needs a thorough investigation as well as the judges and "evidence" that was used to ok the spying.