The general concensus is you want to let each video breath, people seem to be suggesting let a video sit for 48 - 72 hours before uploading a new video, as uploading too many can potentially cannibalise your videos. It seem that the "best" way of uploading is 2-3 videos are week max. But you can always experiment. try uploading every day for one week, then the next week upload only twice for the week and see how the data for each video, for each period compares. If you're a new channel you still have plenty of room to experiment and try things. See what works best for you.