How short can a twitter video be?

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Tags

1. #internal
2. #according
3. #device
4. #upload
5. #video
6. #directly
7. #longer
8. #completely
9. #mobile
10. #views
11. #using
12. #limited
13. #happen
14. #staggering
15. #videos
16. #there
17. #twitter
18. #seconds