A: 1. For video it's 500MB https://help.tubeonai.com/en/article/supported-file-types-sources-limits-1747aku/
2. Can you elaborate on this subscription posts on telegram thing? I am not sure what you mean by this. but I can confirm we can only auto summarize from youtube only at the moment. Auto summary from any rss feed is still in development (will be released in 2-3 weeks)

Thank you