diff --git a/QHF-April-2021.md b/QHF-April-2021.md
index 62d0b93..65de8a4 100644
--- a/QHF-April-2021.md
+++ b/QHF-April-2021.md
@@ -17,10 +17,10 @@ Virtual events will be taking place online (see links below) and in the telegram
 
 No | Name | Time | Coordinator | Country | Language
 ---|------|------|-------------|---------|---------
-1 | News from the Swiss QGIS User Group - how we work and what we're up to | [09h00 UTC](https://www.timeanddate.com/worldclock/fixedtime.html?year=2021&month=4&day=30&hour=09&min=00&sec=0&msg=QGISOpenDay-News+from+the+Swiss+QGIS+User+Group-how+we+work+and+what+we're+up+to "click this link to find out the time in your local time zone") | Isabel Kiefer | CH | English
-2 | LiDAR in QGIS, the beginning of a beautiful friendship | [10h00 UTC](https://www.timeanddate.com/worldclock/fixedtime.html?year=2021&month=4&day=30&hour=10&min=00&sec=0&msg=QGISOpenDay-LiDAR+in+QGIS,+this+is+a+beginning+of+beautiful+friendship "click this link to find out the time in your local time zone") | Tibor Lieskovsky | SK | English
+1 | [News from the Swiss QGIS User Group - how we work and what we're up to](https://youtu.be/7rwKJnSxoRg) | [09h00 UTC](https://www.timeanddate.com/worldclock/fixedtime.html?year=2021&month=4&day=30&hour=09&min=00&sec=0&msg=QGISOpenDay-News+from+the+Swiss+QGIS+User+Group-how+we+work+and+what+we're+up+to "click this link to find out the time in your local time zone") | Isabel Kiefer | CH | English
+2 | [LiDAR in QGIS, the beginning of a beautiful friendship](https://youtu.be/SsoRDfhZzm0) | [10h00 UTC](https://www.timeanddate.com/worldclock/fixedtime.html?year=2021&month=4&day=30&hour=10&min=00&sec=0&msg=QGISOpenDay-LiDAR+in+QGIS,+this+is+a+beginning+of+beautiful+friendship "click this link to find out the time in your local time zone") | Tibor Lieskovsky | SK | English
 3 | [QGIS e R, estatística e análise de dados espaciais.](https://www.youtube.com/watch?v=PlOlaqNGuv8) | [14h00 UTC](https://www.timeanddate.com/worldclock/fixedtime.html?msg=QGISOpenDay-QGIS+e+R%2C+estat%C3%ADstica+e+an%C3%A1lise+de+dados+espaciais&iso=20210430T11&p1=45&ah=1 " click this link to find out the time in your local time zone") | Sidney Goveia | BR | Portuguese
-4 | (Video) Presentation about QGIS Colombia | [17h00 UTC](https://www.timeanddate.com/worldclock/fixedtime.html?msg=%28Video%29+Presentation+about+QGIS+Colombia&iso=20210430T17&p1=1440&am=15 "(Duration: 15min) Click this link to find out the time in your local time zone") | QGIS Colombia | CO | Spanish (English subtitles)
+4 | [(Video) Presentation about QGIS Colombia](https://youtu.be/lDwqshp0puA) | [17h00 UTC](https://www.timeanddate.com/worldclock/fixedtime.html?msg=%28Video%29+Presentation+about+QGIS+Colombia&iso=20210430T17&p1=1440&am=15 "(Duration: 15min) Click this link to find out the time in your local time zone") | QGIS Colombia | CO | Spanish (English subtitles)
 5 | [Uso do QGIS na pesquisa socioambiental.](https://youtu.be/AgS_Lyp0FbI) | [17h00 UTC](https://www.timeanddate.com/worldclock/fixedtime.html?msg=QGISOpenDay-Uso+do+QGIS+na+pesquisa+socioambiental&iso=20210430T14&p1=45&ah=1 " click this link to find out the time in your local time zone") | Jocilene Barros | BR | Portuguese
 6 | [QGIS: Comunidade Além Fronteiras - uma jornada pessoal.](https://youtu.be/-4VrUAms6Do) | [18h00 UTC](https://www.timeanddate.com/worldclock/fixedtime.html?msg=QGISOpenDay-QGIS%3A+Comunidade+Al%C3%A9m+Fronteiras+-+uma+jornada+pessoal&iso=20210430T15&p1=45&am=30 " click this link to find out the time in your local time zone") | Adelcides Varela | CV,BR | Portuguese
 7 | [Design de Mapas e Mapeamento Afetivo com QGIS.](https://www.youtube.com/watch?v=NQlh5gUrsJM) | [19h00 UTC](https://www.timeanddate.com/worldclock/fixedtime.html?msg=QGISOpenDay-Design+de+Mapas+e+Mapeamento+Afetivo+com+QGIS&iso=20210430T20&p1=133&ah=1 " click this link to find out the time in your local time zone") | Tiago Sousa | BR | Portuguese