I just captured VHS with a Rec 709 colors space instead of Rec 601.

[jpvoodoo]

I used the wrong colors space for SD.
I captured with a 709 color. How much does this matter?
It doesn't look any different.
Would I have problems down the road?

[davexnet]

Would I have problems down the road?

With what - converting to DVD?

[jpvoodoo]

I will be converting to Mp4 and DVD.

I also would like to archive the lossless file to use for future formats

The color space setting was buried in advanced settings in OBS. It used the ULHO UTVideo codec.

I think it should have used ULY2 for 4:2:2 chroma sampling.I have since found out that OBS supports only 4:2:0 and 4:4:4 chroma subsampling.

I think I could choose I444 color format and 601 color space and it would use 4:4:4. i understand VHS doesn't contain the quality where it would matter. But I am trying to choose a format that will retain the most detailed information in case I want to move to another format than Mp4 and DVD later. I also want to retain the most correct colors.

But I don't know if it is harmful to choose 4:4:4 for a 4:2:2 source.

So I have these ULH0 files and I am wondering if I should recapture them into some other format such as the ULY4 or ULY0 codecs which use the 601 color space, but are 4:4:4 and 4:2:0 respectively.

[phelissimo_]

Don't use OBS for analog video tape capturing. OBS is for recording your screen or streaming.
Use VirtualDub. In VDub you can adjust the settings easier.

[jagabo]

You're capture device should be set to capture YUV 4:2:2 (YUY2, UYVY, V210, etc.). The capture program should be set to take that YUV 4:2:2 video and send it to the compression codec as YUV 4:2:2 (ie, don't let it convert to RGB, YV12, whatever). The compression codec should be set to compress as YUV 4:2:2. Upon decompression, the codec should be set to output YUV 4:2:2.