DT: slight raise in image size limit?

Famous when dead

Before this turns in to an insane thread with lots of not at all related comments :)
Is there any reason images are capped at 1mb and is there room to tweak that!?
Similarly, video hosting - impossible?
I understand the implications for physically hosting dodgy or illegal things that link directly back to yourself/the site like bootlegs or unreleased stuff, but things like higher res pics or small mp4s - is it possible or an utter nightmare?
I ask as some pictures I've wanted to post fall fowl of the limit.
Thanks in advance,
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