Atarian

The boxing match cellphone has clearly a good couple of inches depth to it, meaning it can't possibly be a cellphone.

NeedMoarGuitars

The 1940s hipster has been well explained (sunglasses and camera are contemporary, the shirt is for a local sports team) so he is likely just some dude who dressed ahead of his time. The two women with the cell phones don't seem to be well explained at all. Even if they are using some sort of hearing aid as people have suggested no one has adequately explained who they are talking to. This is a fun subject.

Sciency

Here's one guys attempt at debunking a few of these time travel theories. His explanations seem sound to me, but decide for yourself. If you can put aside this guys distaste for conspiracy theories, he really is a very smart guy that has a background in sfx and film. He specializes in analyzing viral videos of supernatural events.

He also has an excelent video on the ghost car here

swolejusticewarrior

Honestly they just looked like women who were holding their pocket books up to their ear to maybe stifle conversation like youd do with your hand. That's why no one in the film cares.

bfriend13

No one has any explanations?

swolejusticewarrior

Most were fake and obviously fake. Like the angel and the last one with theguy walking through a door. The other ones were just camera angles

salvia_d

that was fun.

Sosacms

I figure technology has already reached the point where nothing is really believable. So it's all just neat.

But come on time travelers, get your shit together. You're either getting sloppy or piss poor at dropping hints.