Don’t worry, most people’s deadlifts suck. Takes years of practice and training for most people to get a decent deadlift, and if you don’t learn properly it can be a pain undoing bad habits. Good news is your looking for help to get better so your on the right track. Speaking as someone whose deadlift was an uncomfortable dumpster fire for the majority of the decade and a half of lifting weights I promise you with some consistent cues and practice you will notice a big difference.
I would put it solidly in the realm of “ok”. Good news is there are a few things you could probably correct fairly easily with some practice. Also take into consideration that at a competition, if you are truly doing a max effort lifting some form breakdown can be expected, but should be avoided if possible. It almost looks like you are setting up for a clean, or “clean style” deadlift. Did you by chance start lifting through Crossfit?
I will preface this by saying it is important to take into consideration that everyone is built different so everyone might have a different way of deadlifting. However, there are some “best practices” that everyone should implement:
Your back should be straight and your spine should stay aligned from neck to lower back, and your shin angle should be perpendicular to the floor. If you cannot accomplish both of these, making your back as straight as possible should be priority. From your training video it looks like your back is straight, except for your final couple reps when you cock your head back like it means your will pull harder. Ideally you want your neck to stay in alignment the whole time. It’s hard to see your shin angle in any video, but from your stance width I assume its a bit angled.
You will want to be braced and tight before initiating your pull. In your competition videos, you can see you almost “jump” into the the pull. This isn’t a great idea, as your going to lose a lot of power off the floor and probably place an undue amount of sheer stress on your spine and other body parts. Newer lifters often do this as a way to get a little more speed off the floor, but it can take a few moments getting tight in the bottom position of the deadlift. And it can feel like crap, which is why it is tempting to just rush through it and get the bar moving. Make sure you are locked in, all the way from you glutes, to your core, to your lats before initating your pull.
The bar should be touching your shins solidly throughout every portion of the lift. If it is starting to drift away at any time, this probably a sign your uppper back (ie. lats) are not tight enough. You also may not be starting close enough to the bar.
A good rule of thumb is your stance should probably be shoulder width to just inside shoulder width. Slight foot angle. Yours does look a bit wide, but I imagine that it’s because it’s more comfortable, and you get better leg drive in a stance similar to your squat. Like I stated before, it almost looks like you are setting up for a clean. Personally I deadlift with a very close foot stance. If my thighs weren’t so large I would probably deadlift with my heels touching. Also consider I am near your heigh (5’7") and I cannot sumo to save my life. It feels awful through every portion. So you may need to experiment with slight changes. The best stance is probably the one that allows you good leg drive out of the bottom but still allows you good pulling strength at the top. It also needs to allow you to get braced like I mentioned before. Again, you may need to experiment a bit over time.
Find yourself some cues that you use for yourself, and use them to RESET AFTER EVERY REP. This is your practice. Everyone is different so everyone’s cues may differ. However, the same thing is probably going to work for most people. A good resource is a video on the EliteFTS Youtube channel. It is called So Ya Think You Can Deadlift with Swede Burns…or something to that effect. I highly recommend watching it. Made a huge difference for me.
This is because the way your deadlifting is currently your strongest position, but its probably not the most efficient. Over time with practice and training you will be able to lift more with more efficient technique. A lot of lifting is taking 3 steps forward 2 steps back. Check your ego, and you will have a longer, healthier lifting career.
I also do not deadlift with a belt and haven’t for years. It has always been extremely uncomfortable and prevents me from getting into position. This is not an uncommmon thing. If you’re new to lifting you can honesty probably forgo the belt while you learn proper breathing, bracing and technical proficiency. Introduce it back in later as a force multiplier/safety tool when prepping for a competition.