Very useful, nicely structured, would be 5 stars if
1) it didn't slow YT videos to an almost complete lag; (database 4495)
---Would marking the text (purple or red) instead of the image use less resources?
---I have many unloaded tabs of videos, is something collating all those unloaded tabs each time?
2) it said when each option marks a video- do any mark when they are queued? When do the YT options mark them? When does history matk them
3) once you have a collection in memory, which ones are needed to update it?