Absolutely not. Transcripts are full of repetition, "ums", and verbal ticks. They are hard to read and don't rank well. Use the transcript as your raw material, but rewrite it for a reading audience.
AI can help with the initial summary, but you must manually check for accuracy. Videos often contain specific nuances that AI might miss or hallucinate. Your expertise is what makes the blog valuable.
The best spot is usually right after the introduction. This encourages people who prefer watching to stay on the page, which increases your "Dwell Time" (a positive SEO signal for Google).