Embeded video in iframe broken, shows empty

[Circloud]

Description

Like the screenshot shows, the embedded video in Capy displayed as empty compared with the same feed entry in FreshRSS.
After my fix for preventing garbled text in embedded video in #1845 , it worked fine for me for a while, then recently it displays as empty. Not sure which exact commit introduced this bug.

Same as previous discussion #1820 , the problematic feeds are Bilibili feeds generated from RSSHub with cookie configured, and it works well on FreshRSS so it shouldn't be the problem from source content server. Haven't tested on other feeds containg iframe embedded video.

Example feed content

<rss xmlns:atom="http://www.w3.org/2005/Atom" version="2.0">
<channel>
<title>亿点点不一样 的 bilibili 空间</title>
<link>https://space.bilibili.com/407054668</link>
<atom:link href="my-selfhosted-rsshub-instance" rel="self" type="application/rss+xml"/>
<description>亿点点不一样 的 bilibili 空间 - Powered by RSSHub</description>
<generator>RSSHub</generator>
<webMaster>contact@rsshub.app (RSSHub)</webMaster>
<language>en</language>
<image>
<url>https://i1.hdslb.com/bfs/face/9a2c23800387d9c871f3b5dd3620dc1c3c50d2f9.jpg</url>
<title>亿点点不一样 的 bilibili 空间</title>
<link>https://space.bilibili.com/407054668</link>
</image>
<lastBuildDate>Tue, 10 Mar 2026 03:26:15 GMT</lastBuildDate>
<ttl>1</ttl>
<item>
<title>学习兽医72小时，亲手给牛助孕接生是什么体验？</title>
<description><iframe width="640" height="360" src="https://www.bilibili.com/blackboard/html5mobileplayer.html?aid=116141183866190&amp;cid=undefined&amp;bvid=BV19XA2z5Epu" frameborder="0" allowfullscreen="" referrerpolicy="no-referrer"></iframe><br><img src="https://i2.hdslb.com/bfs/archive/7c6bd7de615c61d2e0b8644420a976c6ef0034ee.jpg" referrerpolicy="no-referrer"><br>这次，我们来到了寒冷的东北农村，向有着30多年兽医经验的龙兽医@龙腾虎跃龙兽医 学习体验兽医这份职业，也想带着你一起，深入了解一下我们身边的这些动物们。如果你喜欢这期视频，请多多支持我们，并把视频分享给你的朋友们一起看看！</description>
<link>https://www.bilibili.com/video/BV19XA2z5Epu</link>
<guid isPermaLink="false">https://www.bilibili.com/video/BV19XA2z5Epu</guid>
<pubDate>Fri, 27 Feb 2026 09:00:00 GMT</pubDate>
<author>亿点点不一样</author>
</item>
<item>
<title>手术时，麻醉医生对你做了什么？</title>
<description><iframe width="640" height="360" src="https://www.bilibili.com/blackboard/html5mobileplayer.html?aid=116033608294221&amp;cid=undefined&amp;bvid=BV1zvFZzyELF" frameborder="0" allowfullscreen="" referrerpolicy="no-referrer"></iframe><br><img src="https://i1.hdslb.com/bfs/archive/70e6f3cd3ec623d56b0988fcfba62819c2f7aa2e.jpg" referrerpolicy="no-referrer"><br>我们拍摄过许多手术，几乎都需要麻醉，为什么麻醉能让你一下子就睡过去了？麻醉对身体有伤害吗？这一次我们来到了余杭区第一人民医院，想带你一起看看，麻醉医生到底对我们的身体做了什么！ 本期节目由浙大一院良渚分院（余杭一院）提供医疗与场地支持。节目均在专业人士陪同下进行拍摄，手术有风险，请遵医嘱进行治疗。</description>
<link>https://www.bilibili.com/video/BV1zvFZzyELF</link>
<guid isPermaLink="false">https://www.bilibili.com/video/BV1zvFZzyELF</guid>
<pubDate>Sun, 08 Feb 2026 09:00:00 GMT</pubDate>
<author>亿点点不一样</author>
</item>
<item>
...
</item>
<item>
...
</item>
<item>
...
</item>

[jocmp]

Thanks @Circloud, I was able to reproduce the issue on my RSSHub instance too. It looks like it's an issue with Bilibili's media within the iframe. I have a potential fix that I'm vetting:

p.s. are the characters moving along the top of the video user comments? YouTube unfortunately has nothing like this in the US.

[Circloud]

Thanks.

haha, it's different from comments, and called danmu, quite popular in east asian platforms. It's a way to interact with other users at a specific timestamp in the video.

[Circloud]

I also tested the previous commit f8ef424 with the same source, and it shows it works on that commit. So is it a problem or change on Bilibili side?

[jocmp]

You're correct that it was working as of f8ef424. After that, it stopped working due to a regression to fix missing images #1850.

[jocmp]

The iframe bug should be fixed in 2026.03.1201, but let me know otherwise!