Telethon: video stream does'nt work in telethon==0.19.1.6

[aminhyper]

Hello
I installed telethon==0.19.1.6 in one of my server, everything is OK, but when i want to use stream video with this code, it is not effect:
client.send_file(entity,path,allow_cache=False,attributes=(DocumentAttributeVideo(0, 0, 0,supports_streaming=True),))
I installed telethon ==1.4.3 in another server, when i run this code with python it works finely and i can get video with stream, but when i use this code in flask i get error:
RuntimeError: There is no current event loop in thread 'Thread-4'
I do not know which version to use
I encounter a problem in every version I use
Unfortunately, I am banned from Telegram group and I can not ask my question there
Thank you

[Lonami]

Do not open duplicates (#1067). I already told you to read the documentation, and the error you get has nothing to do with video stream.

[aminhyper]

Which part of the documentation should I study?
My condition is such that I can not read all the sections

[Lonami]

If you can't read pay someone to help you, but this is issues with the library, not a support section to help people.