[Feature Request] Highlight videos filter

[g-rocket]

Similarly to how I can filter out videos I don't want to watch, it would be nice if I could highlight videos I don't want to miss. It would be a button right next to the filter button that would bring up a dialog similar to the filter dialog, where I could type a search string to match what videos that I wanted highlighted. Then, whatever videos matched that would show up with a green background, or something like that.
The reason I would want this is that there are some video series that I really like and don't want to miss a video of. However, my sub box is big, so it would be nice to be able to highlight videos I want to make sure I watch.
If you add this, it might be nice to also add a setting to show only highlighted videos, similar to how you can show only unwatched etc...

[g-rocket]

Here are some example images of what this feature could look like:

---

If I had told it I wanted to highlight the Thief series on davidr64yt's channel and the Deus Ex Human Revolution series (same channel), it could look like this:

The reason that the Deus Ex video is a lighter color is because it is watched

---

Here is an example of what the dialog might look like for adding a highlight on the Deus Ex series:

The text would probably be changed a bit more than this, and would obviously be in the same font and font size, but you probably get the idea

---

Here is an example of what the extra tab to click on to highlight a series might look like:

The tab for highlight would be the star, and it is supposed to be the same color as the filter and hide tabs. Star was the best I could think of for highlight, but if you have a better idea go ahead and use it.

---

Please note that these were all done in GIMP, and probably have some minor flaws/inconsistencies. I'm sorry about that, but I'm not very good at making them.