I don't have a specific video to recommend, but it looks like a general youtube search for how to locate the prostate will turn up several options that explain the process with visual aids that you might find more helpful than a static illustration.
I was able to find a multitude of diagrams as to how to find your prostate just by googling how to find your prostate and going to images. Were those hard to understand?
I hate the word homophobia. It's not a phobia. You're not scared. You're an asshole.
Something that might help is that most people's prostate becomes enlarged when they are aroused. Try spending a few minutes doing something that turns you on, then go hunting for it. You should be able to feel a walnut sized lump a short ways inside your rectum. Sometimes pushing on it feels really pleasurable but at first it may just feel like you have to urinate. If anything hurts then take it slower or stop!