[Brajeshwar]

Honestly, I believe you have made it a tad complex than it needs to be. I migrated to Jekyll from WordPress about 4 years ago. It does have all 100s in Google PageSpeed. I used Jekyll as just another tool so I can stick to GitHub Pages. There is nothing tied to anything, and I can move all the Markdown contents to another system within hours, if not minutes. I can also upload the generated HTML via FTP, and it will work as well.

Almost all audio, images, and videos are rather ornamental, and the content will be OK without them. I try to have all content as standalone on its own as possible. For instance, the posts follow the pattern "_posts/YYYY/YYYY-MM-DD-url-goes-here.md," so I know where the yearly content is, despite each post having its own designated published date. I also have a folder "_posts/todo" where published (but work-in-progress) and future dated posts live.

For images, I stopped worrying about serving multiple sources. I optimized it somewhere between good enough for both mobile and higher (I now consider tablet and desktop the same).

https://brajeshwar.com/2021/brajeshwar.com-2021/