If you are on a mobile device, holding over the username of a user will open a dropdown with options to โopen linkโ or โcopy linkโ, and the same applies to the name of an anime (so long as it is a link, like from the userโs page, not from within the anime itself)
If you choose to โcopy linkโ you can paste said link in the description or comments of your anime, like so:
Also, if you cannot grab all of the links before you post your anime, you can also click the โEditโ button underneath โtranslateโ to edit the description to your anime AFTER posting, so you can add the links one-by-one