I am new to Speedrunning actually I have never speedrunned before and I think I need a cable to record it but I don't have a cable that plugs into my switch and pc at same time... I don't really wanna buy one either also do I need a timer if i do any easy to use ones for my situation
Phone camera works fine for recordings. if you want a better quality recording, you'll need to invest in a capture card, and have a PC that can handle it - the capture card should come with all the cables. If you want a timer on the recording you'll need to use third party recording software such as OBS, but you don't need to have that - you can always retime afterwards, and the mods check the timing anyway.
I lost my phone and I got a mac could I just set it so the camera is facing my switch and record that way?
as long as the gameplay footage and audio is clear, it should be fine