Strange and same iframe coming from different sources

Hello Allen

Thank you for a great plugin…

since yesterday, i have been receiving from different sources that contain the same iframe.

this wouldn’t be a problem as i am using strip tags for get the content but it is leaving a gigantic space in each post… the suspect iframe is:

<iframe src=”//res3.feedsportal.com/test/i.html”></iframe>

if i strip iframe from content, [youtube] does not work. so i would like to keep iframe.

i see this coming from a few different sources like new scientist, gizmodo, cnet and many more..which are not affilates or associated.

what is this? and any work round to keep [youtube] .. again if i strip iframe it would not show [youtube]

this start happening since new feeds were pulled in since last night 4/16.

im on version 2.67.4 and wp 3.9

please help.

thanks

https://wordpress.org/plugins/wp-rss-multi-importer/