Give the user a way to see which subscriptions failed to load

[Outlet2048]

Checklist

• I checked, but didn't find any duplicates (open OR closed) of this issue in the repo.
• I have read the contribution guidelines given at https://github.com/TeamNewPipe/NewPipe/blob/HEAD/.github/CONTRIBUTING.md.
• This issue contains only one feature request. I will open one issue for every feature I want to request.

What feature do you want?

Show the user which subscriptions failed to be loaded

Why do you want this feature?

Right unter the "feed updated" bar or says "not loaded: 2"
And I really want to know which two, so I can see if I'm missing out on channels that are important to me

[Outlet2048]

Recently is has been getting worse
Every time I load my feed I get a different number of "not loaded" channels

Would love to see which ones cause the issues

[Donkey-Doug]

Recently is has been getting worse Every time I load my feed I get a different number of "not loaded" channels

Would love to see which ones cause the issues

Same for me. I think youtube changed something.

[AudricV]

Would love to see which ones cause the issues

It seems to be the ones which contain shorts: look at my comment on #8034.

[colemickens]

Hm. I was coming to +1 this feature, but then I spot-checked one of my subscription groups. It shows that it has 5 channels inside. When I refresh, it consistently fails to refresh one.

However, if I go to each channel, I see that all of them are still active. So I wonder if this is masking a bug.

Has anyone checked to see if adb log at least contains any hints?

(I would be wiling to bounty this feature, but it seems like project is still in refactor/freeze mode)