1-2. I can't reproduce it. Try to disable other extensions, I think you have a conflict with something.

3. It's expected behavior because it uploads all pages and next hides videos by filters. If you want to use it without disappearing(seamless experience), you should use feed mode https://youtu.be/r4iX53Qg2sE?t=233

4. It takes some time, but it's insignificant, and no one complains. Again I think it's related to conflict with something another extension.

5. It doesn't make it worse because PocketTube has Android and iOS, you can find it in the official store.

6. I want my users to know about every extension upgrade, what it's, and how to use it. I'm not going to make a useless update that no one use. It's part of the extension, and every update has free options. Also, you have a close button, so why not close it and just a little appreciate the work behind the extension? But it's really stupid to use my extension and don't see special videos for updates. Every update takes time to implement and produce tutorial videos.

PocketTube is not only about the collection. It has a bunch of different functions like Deck, filters, sorts, mark as watched, and more which you can on my YT channel: https://www.youtube.com/@PocketTubeHQ/videos

I have been developing the extension for over 6 years and would say unfortunately only ads revenue inspires YouTube to implement features.