1. A guy in the beginning claims that they were a very technological advanced city with space travel and submarines. How exactly does a whole civilization die and disappear in a single day if they are so advanced?
2. People comparing it to Troy, and claiming that Troy was also a mythological place that was found to be true. Tror was never a myth, so comparing it to Atlantis makes 0 sense to me whatsoever.
... and that's just from the first 3 minutes that I watched.
Don't get me wrong, if you're a believer and think it's fun to play around with this, by all means be my guest. I am not, because I don't like to base my opinions on pure guessing without any scientific evidence.