We do it, and it's a lot of work. A lot. Best advice is to have a plan, and spend some time building up a reserve of videos you can release if something comes up and you have to miss a day. Also theme your week, so that you do certain types of videos on certain days.
If you're just ding in in a sloppy, haphazard way and posting videos for no reason other than you said you'd post something, the quality sill suffer. Really spend some time deciding what you can accomplish in 5-7 videos a week, how you are sustaining that, and what differentiates one video from the next. Best of luck!