That was a pretty solid video... The guy didn't get all weird or drop down any rabbit holes
I think your question is that... will believers (born again, folks believing on Christ instead of their on works as a Christian) be fooled by all the shenanigans that the False Christ will play in the end times. The answer is No.
Matthew 24:24
24 For there shall arise false Christs, and false prophets, and shall shew great signs and wonders; insomuch that, if it were possible, they shall deceive the very elect.
IF it were Possible... That is to say, that it is NOT POSSIBLE for a born again, spirit indwelled elect christian to get hoodwinked.
On the other hand the folks that are just playing Christian will stand in line to get deceived.