Youtube videos are are not posted

Hi! We have noticed that with every day passing by the videos that plugin can upload get's lower. We have targeted specif channels and we can see that these channels have new content up but they are not fetched in. Decline goes from 50 / 33 / 19 / 19 / 12 / 9 Also have same issue with another website where numbers also going down. We have separated API's for both portals. When we try to manually get videos to website then we get yellow  mark after loading. What is that? Sometimes it's a red X mark. Thanks for help! Carl