if I had to guess, I would assume you rendered the wrong composition. you should make sure that you are rendering the composition you are previewing. an easy indication is the name.
to make sure you can click twice on the rendered queue item in the render queue and it will open the timeline panel for that item.
if that's not it, and you preview one thing in your composition panel, but seem to render another, and it is the same composition - please provide screenshots of the full interface so we can see what what goes on in your project ,composition, and timeline panels vs. your final video.
make sure you read/watch this to understand the rendering process:
more thorough information here
thanks for the reply. I did read the basics that you sent at the bottom of your reply before I posted my question and couldn't find anything useful for my problem. I also tried double clicking the project and I'm sure I rendered the right one, as I did what you said and I've also only worked on 1 project so far.
Here's a screenshot of my full AE window, below are two screenshots with the render settings I used.
I can also add a video of what the composition preview looks like versus what it ends up rendering if required. Thanks anyway for the help.
You were right this time, this fixed it! And I don't know why I checked those as guide layers, must have done that by accident when I was messing around a bit. And seeing as though I didn't yet know what the guide layer indicator was, I didn't know I'd done that. Anyway, thanks so much!
Great! thanks for the feedback.