detect ip ban

detect ip ban

this was in place for some time (when the test instance got banned).

note that this ban can't be bypassed with anti-captcha and the logic
for it doesn't anticipate that. you must remove your anti-captcha api
key from the config file!

note that during this time, invidious changed 'params' value of
get_video_info(); this was not in response to increased ip bans. we
still use the old value because it still works and the new one doesn't
return endcards.
c.f. https://github.com/iv-org/invidious/pull/4156