Okay, third post in a row... I should have just watched the video all the way through to begin with... :P
I've posted a link to the info on the first electrical part you asked about already (the TPS), the second one is the ISCV (Idle Speed Control Valve, or just ISC). You can leave it on to pull the valve covers, but you may want the extra room. There are two bolts connecting it to the upper plenum, leave the screws alone. There are also two small coolant hoses connected to it, one on top and another down below that's harder to see.
The electrical connector between the Y pipe's branches is the cold start injector. You do not need to worry about disconnecting or removing this.
If you have trouble getting the TPS connector off use a small screw driver to pop the rectangle of spring steel wrapped around it off and it'll pull away more freely.
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