Add a feature to download missed video due to unforseen problems, such as a shadow ban by YouTube

To sae time re-inputting a ton of tracked channels individually to catch up on missed downloads due to being shadow banned by YouTube or if another problem causes you to miss downloading channel content. Add a feature where we can download previous content from a set period of time of as an example 3 weeks worth of video's. This would be a life saver as, if there are people like me who are downloading just over 200 YT channels, it would save loads of time.