FAANG system design interview: Design YouTube (with FAANG Senior SWE)

Today's system design mock interview: "Design UA-cam."
Candidate: Ravi, current Senior software engineer at a FAANG/MAANG company and now a coach on our platform.
Book a coaching session with Ravi: igotanoffer.com/en/coach/ravi
Chapters:
00:00 Intro
01:08 Question - How would you design a system like UA-cam?
01:21 1. Clarifications and requirements
05:29 2. Resource estimations
14:40 3. High-level design
16:58 4. Deep dive
17:23 4.1 Deep dive (upload)
24:39 Handling multiple device requirements
28:53 4.2 Deep dive (watch)
38:11 4.3 Deep dive (search)
44:00 5. Refining the design
44:49 Overall feedback
45:54 Outro
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[@IGotAnOffer-Engineering]

Get 1-on-1 coaching to ace your system design interview: igotanoffer.com/en/interview-coaching/type/system-design-interview

[@anindyasankardasgupta1882]

i believe using an elastic search on the metadata db, would be much more helpful for searching /fuzzy searching.

[@opppo89]

Why not use a No SQL based DB while uploading videos? We wouldn't have to do the extraction in that case right? We can simply just work with the meta data DB in JSON format.

[@FahmiEshaq]

Thank you. Awesome interview

[@mohammadtoficmohammad3594]

thank you good design

[@vedant_stone]

Great video. I am new to system design, just watching for fun. I was not satisfied with the search deep dive, I don’t know how it’s actually done, but I feel this would not be a convenient way, please correct me if I am wrong. And apart from that I also am unsure why he replicated the video to another CDN, how would that help 37:13 ? Could anyone please answer my questions?

[@interestube6288]

Too much time into math and numbers??

[@MinekEzQM]

Yep. And all in vain. He forgot about trans-coding and storing one video in multiple formats. 100MB / vid is way too humble of an estimate.

[@mohitkalra9329]

Popular adaptive streaming technologies include Dynamic Adaptive Streaming over HTTP (DASH), HTTP Live Streaming (HLS), and Microsoft Smooth Streaming.
ua-cam.com/video/hqa2sfoGRlI/v-deo.html