Ya, just like when u bring in stills too small. When u bring them in HUGE, they will not look their best.
Double the size of ur sequence if ur doing moves on them. 72 DPI for video – RGB – 8 bit.
You didn’t mention your original codec – but exporting uncompressed is fine. You doing it the best u can now.
If you sent him 1 file 8 or 10 bit uncompressed and 1 file Animation codec – u’d be hard pressed to see the diff.