How to remove shadows on dslr sony a5100

Hello everyone! Two weeks ago I bought a Sony a5100 with 16-50 lenses (Model SELP1650), but when I started filming I noticed shadows around the image. I researched forums about the problem, and saw that it could be an effect called 'vignette'. I shoot with the setting 1/80 F5.6 and ISO around 400 to 600 (with 3 lamps of 60w in a room of 3 meters by 3 meters) and I was recommended to set the camera to 1/60 F11 and a higher ISO (around 2000) I put this setting, but with the ISO increased

You certainly had a busy day on Thursday joining EOSHD and all these other forums and asking this exact question : https://forums.overclockers.co.uk/threads/how-to-remove-shadows-on-dslr-sony-a5100.18888587/#post-33640493 https://www.cnet.com/forums/discussions/how-to-remove-shadows-on-dslr-sony-a5100/ https://forums.tomsguide.com/threads/how-to-remove-shadows-on-dslr-sony-a5100.468121/ https://www.fredmiranda.com/forum/topic/1648443 https://www.cloudynights.com/topic/70