Just recently cleared enough space to use the bag in my basement and spent an hour messing about with it today.
I think it might be a little low but the design of the room doesn't really allow for it to be up higher, not sure how much this matters.
This video was after an hour on the bag and I was fairly exhausted, just having a bit of fun and throwing whatever at this point, including a retarded attempt to channel Anderson Silva around the 40 second mark.
https://www.youtube.com/watch?v=U1MJugxsO10&feature=youtube_gdata_player
I know it doesn't show much and isn't the best angle, but I had a retarded amount of fun today and plan on doing it on the reg, so any tips or comments would be appreciated 
Well kicks are hard to develop and can take a long time. Get the hip over and think about kicking through the bag. You have your hands up which is a good thing.
Yeah, like madmaxej9 said, invest in some training with a coach to get your technique down to prevent reinforcing your bad habits.
What are your training goals?
One thing I can tell from the video is that you're not opening your hips when kicking. Take a half step and swivel your standing foot so that your toes are pointing as far as possible towards the opposite wall as you are kicking (180 degrees to the kick). 
My first goal is to start training in a gym, which I plan to start in March after a trip to South East Asia (going to do a lesson or two in a muay Thai gym when I'm in Thailand, if I have a day where I'm not too hungover, but this is more so just for the experience, not expecting to learn a heap). Right now practising on the bag is hopefully going to give me a bit more confidence going into a class.
A local gym does mma/kick boxing/jiu jitsu & karate classes, not sure where I want to start, probably kick boxing then add in some bjj and go from there.
I'm still not in the best shape, in the last 2 years I've went from being a couch potato for my whole life to exercising and eating healthy regularly, but I'm still nowhere near the condition I'd like to be in and I think martial arts training will help me get there.
I've had a look on YouTube and there seems to be a lot of training advice available, if anyone has any tips on some good channels it would be great.
Thanks for the advice so far, it's much appreciated. Will try and focus on my hips and feet with my kicks next time, maybe post some progress videos along the way.
I loved the Roy Jones Jr head movement, Lmao . I'm in the same boat as you. I was hitting the heavy bag last night and thank God I didn't record it. Good luck to you bro, hope to see a video from you in 6 months going beastmode.
You should show your feet in the vid.
would advise against the BJJ if I were you. Learning two martial arts together is not always a good idea. You HAVE to have the time to put into either one to get any good at it.
Outkaster - would advise against the BJJ if I were you. Learning two martial arts together is not always a good idea. You HAVE to have the time to put into either one to get any good at it.I agree.
I started BJJ then onto Muay Thai. Did both for a little while but, dropped the BJJ for MT because it was a bit too much to take in to start with.
Plus, I enjoyed MT a lot more lol.
I'd recommend just get some instructionals on really basic techs ( even youtube vids) & work on solo skills such as the body mechanics of throwing a jab, a cross, slip, pivot etc. Work on these skils individually first 100's of times then put them together in small sequences. At the minute it looks like you're trying to do too much at once. Narrow your focus. Spend one week developing just your jab then add another movemnet to it.
A mirror in the room might help you see what your doing wrong.
Just a few tips-
Don't lean over so much.
Don't bother with elbows, they are a bit advanced for you ATM.
+ get used to kicking with just one leg first, then the other side will be easier to learn in the future.