I have a 2006 Honda accord ex 4cyl manual I bought used with 127k miles and whenever I try to start it it sometimes makes this weird noise and won't start but it usually starts on the second try. The mechanic said the battery is good but it sometimes takes a couple tries to start.

 

I can't see the video on my PC. When the car won't start, is this a crank/no-start or a no-crank/no-start? The differene is if the starter is cranking/spinning the engine vs the starter not cranking the engine.

 

it's not cranking and makes a noise I think the noise is coming from the speakers I can't tell sometimes itl turn over once and then make the noise it feels like it's not getting enough power or something, but it starts right away after one or 2 tries and this only happens sometimes I think when it's hot outside but I'm not sure

 

A no-crank/no-start means the electric starter motor is not spinning the engine for some reason. The starter circuit is pretty simple. The starter gets 12V on the small blk/wht wire when you turn the key to start the engine. That 12V magnetizes the solenoid, which is a mechanical switch that turns on the high power electric starter motor.

Having 12V on that blk/wht wire using a test light will verify the start signal and wiring is good. The large red wire from battery + to the starter is what powers the electric motor. You can do a voltage drop test (measure the voltage between the + battery post and the post on the starter while cranking). Voltage drop should be less than 0.5V.

Most of the time, the starter solenoid is worn out and the starter can be rebuilt or replaced. I'd recommend denso remanufactured starters vs the stuff you can get at the parts store. I've seen posts on here where the replacement starter failed immediately or quickly, so the original poster will assume something else was the problem and start replacing other items. Doing those few tests will isolate the starter is the issue.