Newbie to this OS but not pcs nor distros in general (using a pi4)

Hi there, having an issue with getting a pi4 setup but I think the main issue is my tv.

Its a 720p crt tv but it is 1080i compatable, I sometimes have issues with a full sized desktop running Windows so its not just this, and a android box that worked but defaulted to 1080i

Connect this to a 1080p tv via hdmi no issues, connect using same cable to my 720p crt tv which also has hdmi and nothing.

I know you can do some commandline things to force 720p but is that the only thing I can do?

The secondary issue is when I did have connected by ethernet, I tried adding network files as I have a NAS but it saw nothing Kodi on android box (though older version) worked fine.

There is an internet connection there as I can download add ons.

Finally Youtube, when I go to use it, it tells me I need to set up manually? I guess I can just download an add on but not sure.

Thanks, it worked when I powered back on, turns out one of the hdmi ports didn't work, is this normal?

Also I still need to work out the reason I can't add network share, it works on Kodi on an android box unless I am doing something wrong.

Also is there a way to get zoom on the box? I have a few meetings I have to attend (non work related) but can't use works pc for that.

Thanks, so its all down to getting the network working now as main thing (the whole reason for wanting it)

Any idea on that?

EDIT : Will make it clearer, my NAS is a Pi4 with samba shares (and used as pihole) not the same one as I am using in bedroom.

WIndows pcs, laptops, tabets and android boxes have no issues seeing the network shares but I can't get this to work.

I can't remember, but I do the same as android kodi I think its smb share though I could be wrong which lets me add location but shows nothing there