The car is a Hyundai Accent 2010 with around 100k km, which I use 2-3 times a week for short trips, and once every 3 months for longer (2+ hour) trips.
For the last two weeks, I had trouble starting my car, it would only start on the second attempt. Yesterday evening I had to try to start it twice, drove to a grocery store, and when I wanted to drive back 15 minutes later it would not start at all. I recorded a video of the behavior, you'll have to raise the volume to hear it properly: https://www.youtube.com/watch?v=vkTHaHsIsNI
It either cranks infinitely or cranks a bit then stalls immediately. I called CAA (roadside assistance) and they were able to start it by pressing the gas pedal while turning the key. They connected a device for engine errors but there weren't any. Once it had been started once with the gas pedal, it would start normally afterwards.
When I tried it this morning, it started on the first try, without doing anything special. I'm hesitating taking it to a garage right now since the issue is intermittent, and I would like to try to replace some parts myself before going there. What can I check? The battery is new.
