[9.3.0] Formats Urls download speed very slow. (Adaptive format)

[Croodo]

Steps to reproduce

const youtube = await Innertube.create({
retrieve_player: false,
});

let info = await youtube.getBasicInfo(id, "WEB");
let formats = info.streaming_data.formats

Failure Logs

none

Expected behavior

Normal download speed.

Current behavior

Normal downloading speed when download using the format url .

Version

Default

Anything else?

Adaptive formats download speed is very slow , throttled bellow 100kbps for WEB client. I was previously using ANDROID Client that was very fast. But as of now ANDROID Client not working properly so fallback to WEB client but facing this speed issue.

No VPN/Proxy used.

Is this only me or someone else having the same behaviour?

Checklist

• I am running the latest version.
• I checked the documentation and found no answer.
• I have searched the existing issues and made sure this is not a duplicate.
• I have provided sufficient information.

[Croodo]

After doing some investigation found that , throttle depends on the file size, if file size is is low like 1MB or 2MB it will take much longer to throttle and stuck to maximum speed upto 100-200kbps , if file size is like 30Mb it will start with speed of upto 100-200kbps after few chunks it will get faster and to the maximum speed.

[LuanRT]

The adaptive formats need to be downloaded in chunks, otherwise you will get throttled.

YouTube.js/src/utils/FormatUtils.ts

Line 58 in d48b9d0

const chunk_size = 1048576 * 10; // 10MB

[Croodo]

I'm not directly downloading , I created API , chunk_size can be modified in formats urls to API response?