so my car doesn’t want to start and i dont know what’s happening i already changed the crankshaft position sensor, changed the battery and checked the alternator and everything, and it just does that can anyone help me out

 

Looks like your battery is dead or a poor connection at the terminals. Could be something else but that's all I can get out of a 3 second video.

 

i bought a new battery and i looked at the terminals and the connections look good i chedk the fuse boxes for any burned out fuses but everything seems fine

 

To start off, in the future, put more than "I Need Help" on the title. More people will click and respond and help if they know what exactly you need help with. It will also help the next person having the same problem when they search the forum. Now back to your issue. Have you checked the starter? Have someone stand in front of the car with the hood open when you try to start the car and see if he/she can her the starter solenoid turn on. Another thing to check would be the fuel pump. Check fuses and relays associated with these devices. If the brake pedal switch is not working, car will not start either. Is the light around the start button lit when you attempt to start the car?

 

How did you troubleshoot to determine those parts needed replacing?