Is the Canon T6 an okay DSLR for my needs?

Hey Everyone,

I'm looking at new DSLRs, I should have started this process earlier since I see there were some deals a couple weeks ago... I need it by Friday night as the main reason I want to get one now is because there is a Delta Heavy rocket launch this Saturday at 4AM and I want to get a good video of it. I'm thinking my Galaxy S8 isn't going to produce anything worthwhile.

I don't use DSLR cameras that much anymore, I have a Rebel XT from way back that works fine but does not take videos and I'd like something a little more updated anyways, but like I said I don't use it very much or have too many times where I've said "dang I wish I had a better DSLR" so definitely looking for the best bang for buck given very occasional use. I have 3 lenses on the Canon eco-system already (non have IS though). I have a 75-300mm, 18-55mm and the nifty 50. So I'd prefer to go with Canon over Nikon I think. I know the Nikon D3300 has a bigger sensor but it's also more expensive from what I can see. I found the Canon T6 for $330 refurbished (fine with me) but can't find the D3300 for anything cheaper than $400 with a lens included.

I don't care too much about still image quality since I'm sure that either one will be leaps and bounds ahead of my 8MP Rebel XT, but specifically right now I'm looking to know if the Rebel T6 would be good enough at clarity and focus to take a good video of the Delta Heavy rocket launching with very low ambient light (4AM).

Really appreciate your help. Other camera suggestions are also welcome, just figuring that either in-store pickup or Amazon are my only safe options with my time-frame right now.

Thanks!