@WildTiger to disable color type /youtube and check "Disable formatting" under basic options. To change the color, search the script for ctrl + k to find instances of the color and change to the color you would like. Hint: you might want to search var %msg first to find where the youtube output is. Did that help?

oh thank you so much but can't you show by a video tutorial :/ i don't know how to do that i don't know this things i can't find what you said in there ,or tell me where can i put the color where is $ number or ? i'm sorry i don't know this codes and stuff..

@WildTiger What color are you trying to change and what color would you like it to be?

i want the info to be Black bold and red

Sorry for the late reply, been a little busy and a lot lazy. I do have this on my list and will work on an update to come within the next week.
Thanks for pointing this out!

@WildTiger due to the number of colors, I'm not sure which ones you'd like to change. The colors are located on lines 424 through line 430. If you'd like to update them, replace "4" (currently red) and 10 (currently blue) with whichever colors you'd like. Use the index from this list, http://www.mirc.com/colors.html - let me know if you need help!