I third that. Videos are so incredible inaccessible. Want an easy-to-follow tutorial or heck a searchable document? nah mate video is all you get, and ads with it!
No images is because they want it to work in a plaintext environment.
No tables because you just know someone is going to use it to format stuff that isn't tabular data, though I guess there isn't a way to actually render tabular data either...
Mhm I disagree with your second point. Since you can't use any styling on Gemini objects, you won't get table layout as we had in dark ages of Html. With tables like in Markdown you can just lay out tabular data in an actual table.
Mhm I guess with the plaintext environment we still can link to external resources like images and other multimedia or interactives.
You do get searchable auto-transcripts of videos now, so that's a good thing. Some people work better with videos and find them more accessible. Best of both worlds.
As long as they are not auto-playing and pre-caching, I'm fine with them existing.