You typically don’t have a microphone in your face when recording video. Because of this, video audio usually sounds worse than podcast audio. You’ll want to invest in a high-quality shotgun microphone to fix this issue. You won’t find much better than the Rode NTG-3. It’s expensive but has a 10-year warranty, so it’s built to last. If you don’t have the budget for an NTG-3, the Rode NTG-4 and NTG-4+ provide good-quality audio at a much lower price.