it is possible to record vita footage on phones, but the result wont be good
take a look at my gameplay recording, and let me know if they are good enough for you
I have been recording gameplay footage, I can tell you a few things:
1)
you dont need OBS
using Camera (Windows 10 built-in app) + bluetooth audio dongle(fairly cheap, about 5USD?), is the best + cheapest way to record decent gameplay footage
2)
bluetooth audio is the only way to be noise-free
you will get noisy recording if you use the audio jack port, even with USB charging option disabled
3)
if you use vita-udcd-uvc for video out
then you may want to stick with 544p, 720p may cause vita to shut down randomly
4)
youtube will compress 544p to 480p
if you need better quality on youtube, upscale the video from 544p to 720p before uploading
i never bother to do that though