when the video ends, or you rewind video by clicking on specific position on timeline -> spiner is shown and video doesn't play anymore, all others videos also don't play, you have to "Force quit" the app and reopen the telegram again. Sometimes in these cases app hangs and doesn't even respond and you also have to "Force quit" it . It happens quite often and becomes annoying because video content consumption is one of the main part of using telegram.
I couldn't reproduce bug when video ends on my recording, but it looks exactly the same: the video ends -> spiner -> no other video is playing and you have to restart app
Steps to reproduce
Go to any group/chat
open video
watch the video to the end or rewind it by changing the position on the timeline
Spiner is shown. You can not play any other media, sometime you can not even change channel, app is frozen
Device info
Telegram macOS 9.0.1 (237033) STABLE, MacBook Pro 16", 12.5.1
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