Uncompressed Output

[antsim]

What's the output i should use to get as uncompressed export as possible if my input is prores 4444 hq?

[Selur]

Hybrid does not:
a. support compressed output (since I personally think it's totally useless)
b. alpha channels

Instead of uncompressed you could use one of the lossless formats, since 'prores 4444 hq' should be 12 or 16bit, your choices are:
(ignoring: exporting as a 16bit PNG image sequence)
a. Lossless H.265 with 'Main 4:4:4 - 12bit' (supported by x265)
b. FFvHuff with 'i444' and 16-bit (supported by FFvHuff)
c. FFV1 with 'i444' and 16-bit (supported by FFV1)
are the best choices.
There are other options like DNxHD, ProRes and others that are at most 12bit or 10bit and not lossless.
(Personally, I would probably use FFV1, since it should be supported by anything at supports libav.)

Cu Selur