i made a video and put a lot of time into it. it is approximately 35 seconds long. it took a while because my computer is pretty slow but can still manage to make everything nicely. I started to render it so i could send it to a friend, but it stopped around 18% of the way and hasn't budged in an hour. i've tried multiple times to no avail. The no number on the screen change ( like duration or frames). Is it taking this long because of my computer or is this a normal happening? is it actually frozen?