Observe Repress

It is a nice touch to have someone actually researching Slenderman, instead of your typical vlog where he shows up and starts affecting the person's life from there.  The report in the second video also did sound well written.

There are just a few things that I'm not sure about.  As someone had pointed out in the comments, the camera in the second video was out of focus.  My wife did point out that you did sound like you were reading from a script, but I realize that it probably was meant to sound like you were reading from a report.  However, there were a quite a few instances of stammering with the words.  I couldn't tell if the that was intentional or not.  My advice here is rehearsal is key, and don't be afraid to do multiple takes.

I did notice a typo or two in the text videos.  Make sure to double check your work, that can go for anything.

The last thing:  I can't quite see what the premise of this series is, the talk of the session, the report, and the dream.  This can be both a good thing or a bad thing, and may get explained over the course of the series.  As for now though, I'm pretty confused.

As my husband said, I did think it sounded like you were reading from a script. Even if that's what you were going for, it could've sounded a bit more professional. But I'm a stickler for acting, so hey who knows. Also, again, as he said, I don't get the premise for the series. A lot of series nowadays suffers from a "filming for the sake of filming a Slenderman Series" syndrome. Why did you start filming? Is it a real-life scenario as to why someone would film? Honestly, not to be rude, but right now it kind of seems you're filming something just for the sake of filming a slenderman series. Maybe the reason behind you filming will be explained and that point will be moot, but for right now, that's what I'm seeing.

The tulpa explanation was a good place to start, and was a decent explanation of the theory.  I also have never heard of the Phillips experiment, so that was pretty cool.

As for the sighting video, I like the idea of feeling something different and going straight to filming your surroundings.  It shows that the protagonist knows about the distortion that Slenderman causes, and uses that to detect his presence.  Nicely done in that aspect.

I'm finding it hard not to get confused with the situation of this series.  First we have experiment logs and reports which give it a professional view, and then we have malfunctioning camera phones and walks to the store that make it feel more like a regular vlog.  I suppose that can all go with the safe house and laying low aspect, but at this point it's hard to tell where it is going.

Now I will go onto my biggest criticism, the writing style of the text portions.  Mostly the last card of the sighting video:
"I think Slenderman my have caught on to my ambitions and is sending his turned minions after me, I will have to increase my securities."
It's hard to put my finger on what it is about that statement, but it just feels off.  Like it's hard to roll off the tongue.  It's hard for me to say yay or nay on the way you write because you know the character better than me.  But if I had to say one thing that has me wanting to see more of this, it's the professional feel.  It's the same feeling I get when I read articles from the SCP Foundation.  I really liked the report from Initial Observations.  If I were to write that text card I would have said:
"It is my belief that the Slenderman may have knowledge of what it is that I intend to do, based on the increased presence and activity of his proxies.  I will have to exercise more caution in future attempts at research and other activity."

And lastly, make sure you double check your work.  I wouldn't count proper spelling and grammar as the most important thing in a series, but it goes a long way for holding immersion.  Having to stop and realize that a word is spelled wrong, or a sentence is stated incorrectly, does take me out of the immersion a bit.

 
Yes I can see how the language style thing can be distracting, however there is a rational behind it that will be further elaborated upon in the next couple videos but for a simple version, the sighting video was more of an observation note taken about the encounter as opposed to a full report on it if that makes sense, there are other reasons in addition to that but as I said I'll touch on them later