This baby here is well attached to the breast and actively transferring milk.
Most likely she is not swallowing air because you do not ear clicking sounds or small kisses type of sounds but only the sound of milk being swallowed.
Note the deep movements of the jaw and the regular 'kh', 'kh' sounds.
If you observe this suckling pattern several times in a nursing session, with pauses for breathing, and you do not interrupt your baby before she is satiated, she is likely taking in enough milk for that session.