Importing .csv file to EEGlab with multiple channels for events.

Hi! I'm currently doing an ERP project in which I have created a video that shows photos that either fall under category 1 or category 2. In my experiment I made people watch a video while being recorded on the OpenBCI Ultra Cortex EEG headset. The headset had two photocells attached to the breadboard in order to record the timing of each event. The left breadboard corresponded to category 1 photos and there would be a white flash that the photocell would pick up when those photos showed while the right breadboard corresponded to category 2 photos with the same process. These recordings saved as a .csv file that looks like this:

Using the compiled EEGLAB program, how do I import this data to plot the waveforms and label the two different events? It is worth noting that each video recording I have starts with 5 "signal" flashes in order to tell when the actual experiment started. I've read many forum posts but I seem to only see people using one event condition, not two. Ultimately, I have a large subject group that I am looking to find the grand average of and compare the difference of reaction between the two stimuli. It's also worth noting that I am a high school student that is learning as I'm going. Sorry!