YouTube mobile app adds a si= parameter.
Embed itself removes the parameter to the best of my knowledge. If you have source link visibility enabled, that retains the original link with these identifiers.
they would not manage your xenforo install for you though as the license is in your name and only you can access the latest download files. cloud is a great option for someone for whom the cloud costs are not significant enough to look for alternatives.
should be fairly simple imo. you would need to update your license from subdomain to domain. copy the entire folder structure to base domain. database probably wouldn't need to be migrated as it is the same domain but that depends upon how your hosting is setup. you would need to change the base...
i do wish that the popup was resizable lol. but yeah this is nice. animated webps i imagine would be smaller in size? kind of strange these services do not serve mp4s which are going to be smaller in size than gifs?
depends upon your userbase i guess. most people i know on my board or in general these days would have no idea how big the files they are uploading are. things are just expected to work on the web. and this change by xenforo basically fixed a lot of issues with uploads users faced earlier...
there is no easy answer to that. i have seen images with too many colors (like movie posters with gradients) not get compressed much on webp. jpeg works better on them. this is why some of us are waiting for jxl or even avif to become part of xenforo (and the general web). less complex images do...
i am guessing this is not entirely true. does not matter how big the original image is, if it is smaller than configured size after browser side conversion, it does get uploaded just fine?