And for those who use macs: heres my tutorial.The program that most of you have will be Imovie so we will use that for the basics of adding subs to somthing.
first you need to open imovie (obviously). ok next you need to import the peice of work you need to add subs to. (as seen below):
Ok now you have your piece of work drag it to the timeline at the bottom.
once you have done that, select titles from the menu. as seen below):
then scroll down the titles menu till you see subtitles, click on that and then write the subs for that bit of the dialogue in the box at the bottom, on this screenshot is where it says yuki's tutorial, the two line are for each line of dialogue. here you can change the font, size and color too.
then if your happy with what you have written drag your titles to the timeline under the main bit of footage you used. from there you can change the length and ajust the timing by dragging the subtitle layer around, like so:
.
And then repeat the process for each scentence you want to add.
P.s. in the pics shown, there was no actual footage,you will drag your subs to the space under where they are on my pics.
sorry if its not to clear any more questions or things you dont understand just pm me.
P.P.S. this was done quickly,i will do a more thorough tutorial when i have time.