Mini Program's slow loading of video on his own server

Mini Program video component loads videos from its own server (Ali) very slowly, in the format of mp4. But it will be quick to replace the video link with Mini Program"s official demo video.
I would like to ask what aspects should be taken to solve this problem. Video format coding? Specific format coding. Or what?

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Mar.21,2021

try using other external chain videos to try

use CDN, to accelerate video.

try to adjust the video according to the frame rate of the demo video on the official website. It can be loaded normally. If the network speed is OK, the stutter will not occur, but the initial video loading will take a long time. (after watching some video categories like Mini Program, they all have this problem, so let's solve the problem to this extent first.)

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MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b34b67-2b29c.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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